Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2592-94
Nitro varnish
Published on March 17, 1994
Ministry of Chemical Industry of the People's Republic of China
Implemented on January 1, 1995
Chemical Industry Standard of the People's Republic of China
Nitro varnish
1 Subject content and scope of application
HG/T2592-94
Replaces HG/T2236-91
ZBG51059-87
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of nitro varnish. This standard applies to nitro varnish prepared by using nitrocellulose and alkyd resin as the main film-forming substances and adding an appropriate amount of plasticizer dissolved in an organic solvent.
The products of this standard are suitable for decorative protective coatings on wood products and metal surfaces. 2 Reference standards
Test method for appearance and transparency of varnish, clear oil and thinner GB/T1721
GB/T1722
Test method for color of varnish, clear oil and thinner GB/T1727
General preparation method for paint film
GB/T1728
Test method for drying time of paint film and putty film
GB/T1735
Test method for heat resistance of paint film
GB/T1762
Test method for tackiness of paint film
GB3186
Sampling of coating products
GB/T6682
GB/T6751
GB/T6752
GB/T9271
GB/T92 74
Specifications and test methods for water used in analytical laboratoriesDetermination of volatile and non-volatile matters in paints and varnishesDetermination of the amount of matter in paint and varnish containersStandard test panels for paints and varnishes
Determination of the resistance of paints and varnishes to liquid media
GB9278Temperature and humidity for conditioning and testing of coating specimensGB/T9750
GB/T9761
Packaging marking for coating products
Paints and varnishesVisual colorimetry of paints
HG/T2453
General rules for inspection, transportation and storage of coating productsSH0005
Solvent oil for paint industry
3 Product classification
Nitro varnishes are divided into two types according to their properties and uses:Type I nitro wood lacquer: suitable for surface finishing of indoor wooden products. Type I nitro varnish: Suitable for finishing of outdoor wood products and metal surfaces, and can also be used for surface finishing of nitro enamel. 4 Technical requirements
The product shall meet the technical requirements listed in Table 1: Approved by the Ministry of Chemical Industry of the People's Republic of China on March 9, 1994 and implemented on January 1, 1995
Original paint color
Iron diamond colorimetry, No.
Lovibond color: yellow
Original paint transparency, grade
Workability
Non-volatile matter content, %
Drying time, min
Exterior of paint film Observation
Resistance to viscosity, grade
Heat resistance, at 115~120℃ for 2h
Water resistance, immersed in GB/T6682 grade 3 water for 18hBoiling water resistance, immersed in boiling water for 10min
Resistance to volatile solvents, immersed in SH0005 solvent oil for paint industry for 2h
Nitro group in solvent solubles
General conditions for testing
5.1 Sampling shall be carried out in accordance with the provisions of GB3186.
HG/T2592—94
not more than
not more than
not small hands
not more than
not more than
2 The environmental conditions of the test shall be carried out in accordance with the provisions of GB9278 5.2
The second coat of spraying is barrier-free
The paint film is flat and smooth
No bubbles, wrinkles or cracks, and slight changes in color and gloss are allowed? No abnormality
No abnormality
No abnormality
No abnormality in SH0005 paint industrial solvent oil
Add toluene to equal 9+1 mixed solvent. No abnormal nitro groups exist
5 The paint film preparation method is carried out according to the spraying method in 3(2) of GB/T1727. Use a spray gun to spray on one side of the test base plate. Unless otherwise specified
, after applying the first coat of paint, apply the second coat of paint after 30 minutes. The dry paint film thickness is 25~35um. 5.4 The test diluent is prepared according to Table 2:
Raw material name
Ethyl acetate
Butyl acetate
5.5 The test base plate is in accordance with the provisions of GB/T9271. 6 Test methods
HG/T2592—94
The “specified conditions” in the following test methods refer to the temperature and humidity specified in GB9278. 6.1 Original paint color
The test shall be conducted according to Method A in GB/T1722. During arbitration, the test shall be conducted according to Method B in GB/T1722. The sample pool shall be 25.4 mm during inspection. 6.2 Original paint transparency
The test shall be conducted according to the provisions of GB/T1721.
6.3 Workability
The test panel substrate is 2 pieces of tinplate (about 70 mm×150 mmX0.20.3 mm). Use the diluent specified in Table 2 to dilute the paint until the outflow time is 18 to 23 s (Tu-4 viscometer). Prepare the paint film according to the spraying method in 3(2) of GB/T1727. The test panel shall be placed vertically with the long side horizontal and the short side at an angle of about 85°.
After spraying the first coat of paint, leave it for 1 hour under the specified conditions, and then spray the second coat of paint. If the spraying operation of the second coat of paint is not particularly difficult, it can be evaluated as "no obstacle to spraying the second coat". 6.4 Non-volatile content
According to the provisions of GB/T6751.
6.5 Drying time
According to the provisions of GB/T1728 (both surface dry and solid dry are in accordance with Method A) 6.6 Appearance of paint film
Use the sample after the workability inspection in 6.3, dry it under the specified conditions for 24 to 48 hours, and inspect and evaluate it at any time. Observe under natural daylight or artificial daylight conditions that meet the requirements of GB/T9761 3. If there are no obvious abnormal phenomena such as orange peel, sagging, wrinkling, uneven gloss, etc., it can be evaluated as "the paint film is flat and smooth". 6.7 Adhesion
The test board substrate is 3 pieces of tinplate (about 50mmX120mm×0.2～0.3mm). Spray two coats according to the provisions of 5.3, dry under the specified conditions for 1h, then heat in a constant temperature box at 80±2℃ for 30min, take out the test board and place it under the specified conditions for 1h, as a test sample. According to the provisions of GB/T1762.
6.8 Heat resistance
The test board substrate is 4 pieces of glass plate (about 70mm×150mm×2~3mm). Prepare the paint film according to the provisions of 5.3, dry under the specified conditions for 48h, heat the test board in a constant temperature box at 115~120℃ for 2h, take out the test board and place it under the specified conditions for 1h, as a test sample. According to the provisions of GB/T1735. 6.9 Water resistance
The test plate base material is 4 steel plates (about 70mm×150mm×0.45~0.55mm). Prepare the paint film according to the provisions of 5.3, dry it under the specified conditions for 1 hour, put it in a constant temperature box at 80±2℃ and heat it for 30 minutes, take out the test plate and place it under the specified conditions for 1 hour, then use melted paraffin to wrap the back and periphery of the test plate, and use it as a test sample after the paraffin cools down. Keep 1 of the 4 samples and put 3 into the test. Immerse it in the third-level water that meets GB/T6682 for 18 hours, take it out, and immediately compare it with the preserved sample to check the appearance of the paint film. After 2 hours of recovery, check the paint film again. During the inspection, the paint film around the sample and within 10mm from the liquid surface is not inspected. If at least two of the three samples show no wrinkles, bubbling, cracks or peeling on the paint film during the first and second observations, and the reduction in gloss, darkening or discoloration is not significant during the second observation, it shall be evaluated as “no abnormality”. 6.10 Boiling water resistance
The test panel substrate is 4 glass plates (about 70mmX150mm×2~3mm). 6.10.1 Preparation of test sample
Dilute the sample with the test diluent in Table 2 so that its outflow time is 15 to 25 seconds (Tu-4 viscometer). Place the sample in an appropriate container 3
HG/T2592-94
, so that the sample depth is about 120mm, immerse the long side of the glass plate in the sample in the container in a vertical direction, and the penetration depth is about 100mm, and immediately lift it up, with the side not dipped in the paint facing down, dry it under the specified conditions for 30 minutes, and then dip in the second coat of paint according to the above method. Place it under the specified conditions for 1 hour, enter the constant temperature box at 80±2℃ and heat it for 30 minutes, take it out and place it under the specified conditions for 1 hour, and use it as a test sample. The paint film thickness is controlled within the range of 25 to 35um for the single-sided dry paint film thickness. 6.10.2 Test method
Prepare a beaker for each sample. Fill each beaker with grade 3 water that meets the requirements of GB6682, and put 2 to 3 small ceramic pieces. Heat until 2 to 3 small bubbles rise per second. Hang the painted end of the sample downward in the above beaker, so that the lower end of the sample is about 20mm from the bottom of the beaker and the immersion depth is about 60mm. Soak in boiling water for 10 minutes, take out the sample, and immediately compare it with the sample that has not been tested to check the paint film. Then use appropriate methods to absorb the water on the sample, place it under specified conditions for 2 hours, and then check the paint film again. When checking, the paint film around the sample and within a width of about 10mm from the liquid surface is not checked. 6.10.3 Evaluation
Two of the three test panels have no wrinkles, bubbling, cracks or peeling on the paint film during the first and second inspections, and when the gloss, whitening or discoloration is not significant during the second inspection, it is evaluated as "no abnormality when immersed in boiling water". 6.11 Resistance to volatile solvent oil
The test panel substrate is 4 steel plates (about 70mm×150mm×0.45~0.55mm). Prepare the paint film according to the provisions of 5.3, seal the test panel with the original paint on all sides, dry it under the specified conditions for 1 hour, then heat it in a thermostat at a temperature of 80±2℃ for 30 minutes, place it under the specified conditions for 1 hour, take out the test panel, and use it as a test sample. Type I: Nitrocellulose wood paint shall be carried out according to the provisions of 5.4 in GB/T9274. Type I: Nitrocellulose varnish shall be carried out according to the provisions of 5.5 in GB/T9274. One of the four samples is retained, and the other three are put into the test. During the test, a glass container is prepared for each sample. Each glass container is filled with the solvent specified in the technical indicators, with a depth of about 150mm. The sample is immersed in a depth of about 120mm for 2 hours. The sample is taken out and placed vertically under the specified conditions for 2 hours before the paint film is checked.
If two of the three samples do not show wrinkles, bubbles, cracks, or peeling, and compared with the retained sample, the gloss, viscosity, and hardness do not change much, and the turbidity of the liquid is not great, it is evaluated as "no abnormality after immersion in volatile solvents". 6.12 Nitro in Solvent Soluble Matter
Weigh about 5g of the sample, put it in an evaporating dish, heat it on a water bath, evaporate most of the solvent, and put it in a thermostat maintained at 105110℃ to dry for 1 hour to obtain a solid. Cut a small amount of solid matter and place it on the drip plate. Add a drop of nitro identification reagent and observe the color immediately. If the color is dark blue, it is evaluated as "nitro exists". Preparation of nitro identification reagent: Add 0.1g of diphenylamine to nitric acid solution (100+33)V/V to dissolve it. 7 Inspection, transportation and storage
7.1 Inspection classification
7.1.1 Type inspection
All technical indicators listed in this standard are type inspection items. Under normal production conditions, water resistance, resistance to volatile solvents, back viscosity and boiling water resistance are allowed to be inspected once a month; heat resistance is allowed to be inspected once every three months; nitro in solvent solubles is inspected every six months.
7.1.2 Factory inspection
Original paint color, original paint transparency, workability, non-volatile matter content, drying time, and paint film appearance are all factory inspection items, and each production batch is inspected.
7.1.3 Inspection rules
Perform according to the provisions of HG2458.
7.2 Transportation and storage
Perform according to the provisions of HG/T2458.
HG/T2592-94
The storage validity period of the products of this standard is one year from the date of completion of production. 8 Marking and packaging
8.1 Marking
Perform according to the provisions of GB/T9750. A certificate of conformity and a flammable and explosive mark shall also be attached to each package or packaging barrel. 8.2 Packaging
The product shall be packed in a clean, dry, sealed container free of mechanical impurities, and the volume percentage of the contents in the container shall be 90% to 95%. Determine the volume of the contents according to the provisions of GB/T6752, and then calculate the volume percentage of the contents in the container according to formula (1), V (%). V(%)=
Wherein: V1——the volume of the sample in the container, mL; V2——the volume of the packaging container, mL.
HG/T2592-94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item clause
Item clause
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction Reference
(Reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".2 Test method
Prepare a beaker for each sample, fill each beaker with grade 3 water that meets the requirements of GB6682, and put 2 to 3 small porcelain pieces, and heat until 2 to 3 small bubbles rise per second. Hang the painted end of the sample downward in the above beaker, so that the lower end of the sample is about 20mm from the bottom of the beaker, and the immersion depth is about 60mm. Soak in boiling water for 10 minutes, take out the sample, and immediately compare it with the stored untested sample to check the paint film, then use appropriate methods to dry the water on the sample, place it under specified conditions for 2 hours, and then check the paint film again. When checking, the paint film around the sample and within a width of about 10mm from the liquid surface is not checked. 6.10.3 Evaluation
Two of the three test panels have no wrinkles, bubbling, cracks or peeling on the paint film during the first and second inspections, and when the gloss, whitening or discoloration is not significant during the second inspection, it is evaluated as "no abnormality when immersed in boiling water". 6.11 Resistance to volatile solvent oil
The test panel substrate is 4 steel plates (about 70mm×150mm×0.45~0.55mm). Prepare the paint film according to the provisions of 5.3, seal the test panel with the original paint on all sides, dry it under the specified conditions for 1 hour, then heat it in a thermostat at a temperature of 80±2℃ for 30 minutes, place it under the specified conditions for 1 hour, take out the test panel, and use it as a test sample. Type I: Nitrocellulose wood paint shall be carried out according to the provisions of 5.4 in GB/T9274. Type I: Nitrocellulose varnish shall be carried out according to the provisions of 5.5 in GB/T9274. One of the four samples is retained, and the other three are put into the test. During the test, a glass container is prepared for each sample. Each glass container is filled with the solvent specified in the technical indicators, with a depth of about 150mm. The sample is immersed in a depth of about 120mm for 2 hours. The sample is taken out and placed vertically under the specified conditions for 2 hours before the paint film is checked.
If two of the three samples do not show wrinkles, bubbles, cracks, or peeling, and compared with the retained sample, the gloss, viscosity, and hardness do not change much, and the turbidity of the liquid is not great, it is evaluated as "no abnormality after immersion in volatile solvents". 6.12 Nitro in Solvent Soluble Matter
Weigh about 5g of the sample, put it in an evaporating dish, heat it on a water bath, evaporate most of the solvent, and put it in a thermostat maintained at 105110℃ to dry for 1 hour to obtain a solid. Cut a small amount of solid matter and place it on the drip plate. Add a drop of nitro identification reagent and observe the color immediately. If the color is dark blue, it is evaluated as "nitro exists". Preparation of nitro identification reagent: Add 0.1g of diphenylamine to nitric acid solution (100+33)V/V to dissolve it. 7 Inspection, transportation and storage
7.1 Inspection classification
7.1.1 Type inspection
All technical indicators listed in this standard are type inspection items. Under normal production conditions, water resistance, resistance to volatile solvents, back viscosity and boiling water resistance are allowed to be inspected once a month; heat resistance is allowed to be inspected once every three months; nitro in solvent solubles is inspected every six months.
7.1.2 Factory inspection
Original paint color, original paint transparency, workability, non-volatile matter content, drying time, and paint film appearance are all factory inspection items, and each production batch is inspected.
7.1.3 Inspection rules
Perform according to the provisions of HG2458.
7.2 Transportation and storage
Perform according to the provisions of HG/T2458.
HG/T2592-94
The storage validity period of the products of this standard is one year from the date of completion of production. 8 Marking and packaging
8.1 Marking
Perform according to the provisions of GB/T9750. A certificate of conformity and a flammable and explosive mark shall also be attached to each package or packaging barrel. 8.2 Packaging
The product shall be packed in a clean, dry, sealed container free of mechanical impurities, and the volume percentage of the contents in the container shall be 90% to 95%. Determine the volume of the contents according to the provisions of GB/T6752, and then calculate the volume percentage of the contents in the container according to formula (1), V (%). V(%)=
Wherein: V1——the volume of the sample in the container, mL; V2—the volume of the packaging container, mL.
HG/T2592-94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item Article
Item Article
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction reference
(reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".2 Test method
Prepare a beaker for each sample, fill each beaker with grade 3 water that meets the requirements of GB6682, and put 2 to 3 small porcelain pieces, and heat until 2 to 3 small bubbles rise per second. Hang the painted end of the sample downward in the above beaker, so that the lower end of the sample is about 20mm from the bottom of the beaker, and the immersion depth is about 60mm. Soak in boiling water for 10 minutes, take out the sample, and immediately compare it with the stored untested sample to check the paint film, then use appropriate methods to dry the water on the sample, place it under specified conditions for 2 hours, and then check the paint film again. When checking, the paint film around the sample and within a width of about 10mm from the liquid surface is not checked. 6.10.3 Evaluation
Two of the three test panels have no wrinkles, bubbling, cracks or peeling on the paint film during the first and second inspections, and when the gloss, whitening or discoloration is not significant during the second inspection, it is evaluated as "no abnormality when immersed in boiling water". 6.11 Resistance to volatile solvent oil
The test panel substrate is 4 steel plates (about 70mm×150mm×0.45~0.55mm). Prepare the paint film according to the provisions of 5.3, seal the test panel with the original paint on all sides, dry it under the specified conditions for 1 hour, then heat it in a thermostat at 80±2℃ for 30 minutes, place it under the specified conditions for 1 hour, take out the test panel and use it as the test sample. Type I: Nitro wood paint shall be carried out according to the provisions of 5.4 of GB/T9274. Type I: Nitro varnish shall be carried out according to the provisions of 5.5 of GB/T9274. One of the four samples is retained, and the other three are put into the test. During the test, a glass container is prepared for each sample. Each glass container is filled with the solvent specified in the technical indicators, with a depth of about 150mm. The sample is immersed in a depth of about 120mm for 2 hours. The sample is taken out and placed vertically under the specified conditions for 2 hours before the paint film is checked.
If two of the three samples do not show wrinkles, bubbles, cracks, or peeling, and compared with the retained sample, the gloss, viscosity, and hardness do not change much, and the turbidity of the liquid is not great, it is evaluated as "no abnormality after immersion in volatile solvents". 6.12 Nitro in Solvent Soluble Matter
Weigh about 5g of the sample, put it in an evaporating dish, heat it on a water bath, evaporate most of the solvent, and put it in a thermostat maintained at 105110℃ to dry for 1 hour to obtain a solid. Cut a small amount of solid matter and place it on the drip plate. Add a drop of nitro identification reagent and observe the color immediately. If the color is dark blue, it is evaluated as "nitro exists". Preparation of nitro identification reagent: Add 0.1g of diphenylamine to nitric acid solution (100+33)V/V to dissolve it. 7 Inspection, transportation and storage
7.1 Inspection classification
7.1.1 Type inspection
All technical indicators listed in this standard are type inspection items. Under normal production conditions, water resistance, resistance to volatile solvents, back viscosity and boiling water resistance are allowed to be inspected once a month; heat resistance is allowed to be inspected once every three months; nitro in solvent solubles is inspected every six months.
7.1.2 Factory inspection
Original paint color, original paint transparency, workability, non-volatile matter content, drying time, and paint film appearance are all factory inspection items, and each production batch is inspected.
7.1.3 Inspection rules
Perform according to the provisions of HG2458.
7.2 Transportation and storage
Perform according to the provisions of HG/T2458.
HG/T2592-94
The storage validity period of the products of this standard is one year from the date of completion of production. 8 Marking and packaging
8.1 Marking
Perform according to the provisions of GB/T9750. A certificate of conformity and a flammable and explosive mark shall also be attached to each package or packaging barrel. 8.2 Packaging
The product shall be packed in a clean, dry, sealed container free of mechanical impurities, and the volume percentage of the contents in the container shall be 90% to 95%. Determine the volume of the contents according to the provisions of GB/T6752, and then calculate the volume percentage of the contents in the container according to formula (1), V (%). V(%)=
Wherein: V1——the volume of the sample in the container, mL; V2—the volume of the packaging container, mL.
HG/T2592-94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item Article
Item Article
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction Reference
(Reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".5. One of the four samples is retained, and the other three are put into the test. During the test, a glass container is prepared for each sample. Each glass container is filled with the solvent specified in the technical indicators, with a depth of about 150mm. The sample is immersed in a depth of about 120mm for 2 hours. The sample is taken out and placed vertically under the specified conditions for 2 hours before the paint film is inspected.
If two of the three samples do not show wrinkles, bubbles, cracks, or peeling, and compared with the retained sample, the gloss, viscosity, and hardness do not change much, and the turbidity of the liquid is not great, it is evaluated as "no abnormality in immersion in volatile solvents". 6.12 Nitro in Solvent Soluble Matter
Weigh about 5g of the sample, put it in an evaporating dish, heat it on a water bath, evaporate most of the solvent, and put it in a thermostat maintained at 105110℃ to dry for 1 hour to obtain a solid. Cut a small amount of solid matter and place it on the drip plate. Add a drop of nitro identification reagent and observe the color immediately. If the color is dark blue, it is evaluated as "nitro exists". Preparation of nitro identification reagent: Add 0.1g of diphenylamine to nitric acid solution (100+33)V/V to dissolve it. 7 Inspection, transportation and storage
7.1 Inspection classification
7.1.1 Type inspection
All technical indicators listed in this standard are type inspection items. Under normal production conditions, water resistance, resistance to volatile solvents, back viscosity and boiling water resistance are allowed to be inspected once a month; heat resistance is allowed to be inspected once every three months; nitro in solvent solubles is inspected every six months.
7.1.2 Factory inspection
Original paint color, original paint transparency, workability, non-volatile matter content, drying time, and paint film appearance are all factory inspection items, and each production batch is inspected.
7.1.3 Inspection rules
Perform according to the provisions of HG2458.
7.2 Transportation and storage
Perform according to the provisions of HG/T2458.
HG/T2592-94
The storage validity period of the products of this standard is one year from the date of completion of production. 8 Marking and packaging
8.1 Marking
Perform according to the provisions of GB/T9750. A certificate of conformity and a flammable and explosive mark shall also be attached to each package or packaging barrel. 8.2 Packaging
The product shall be packed in a clean, dry, sealed container free of mechanical impurities, and the volume percentage of the contents in the container shall be 90% to 95%. Determine the volume of the contents according to the provisions of GB/T6752, and then calculate the volume percentage of the contents in the container according to formula (1), V (%). V(%)=
Wherein: V1——the volume of the sample in the container, mL; V2—the volume of the packaging container, mL.
HG/T2592-94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item Article
Item Article
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction Reference
(Reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".5. One of the four samples is retained, and the other three are put into the test. During the test, a glass container is prepared for each sample. Each glass container is filled with the solvent specified in the technical indicators, with a depth of about 150mm. The sample is immersed in a depth of about 120mm for 2 hours. The sample is taken out and placed vertically under the specified conditions for 2 hours before the paint film is inspected.
If two of the three samples do not show wrinkles, bubbles, cracks, or peeling, and compared with the retained sample, the gloss, viscosity, and hardness do not change much, and the turbidity of the liquid is not great, it is evaluated as "no abnormality in immersion in volatile solvents". 6.12 Nitro in Solvent Soluble Matter
Weigh about 5g of the sample, put it in an evaporating dish, heat it on a water bath, evaporate most of the solvent, and put it in a thermostat maintained at 105110℃ to dry for 1 hour to obtain a solid. Cut a small amount of solid matter and place it on the drip plate. Add a drop of nitro identification reagent and observe the color immediately. If the color is dark blue, it is evaluated as "nitro exists". Preparation of nitro identification reagent: Add 0.1g of diphenylamine to nitric acid solution (100+33)V/V to dissolve it. 7 Inspection, transportation and storage
7.1 Inspection classification
7.1.1 Type inspection
All technical indicators listed in this standard are type inspection items. Under normal production conditions, water resistance, resistance to volatile solvents, back viscosity and boiling water resistance are allowed to be inspected once a month; heat resistance is allowed to be inspected once every three months; nitro in solvent solubles is inspected every six months.
7.1.2 Factory inspection
Original paint color, original paint transparency, workability, non-volatile matter content, drying time, and paint film appearance are all factory inspection items, and each production batch is inspected.
7.1.3 Inspection rules
Perform according to the provisions of HG2458.
7.2 Transportation and storage
Perform according to the provisions of HG/T2458.
HG/T2592-94
The storage validity period of the products of this standard is one year from the date of completion of production. 8 Marking and packaging
8.1 Marking
Perform according to the provisions of GB/T9750. A certificate of conformity and a flammable and explosive mark shall also be attached to each package or packaging barrel. 8.2 Packaging
The product shall be packed in a clean, dry, sealed container free of mechanical impurities, and the volume percentage of the contents in the container shall be 90% to 95%. Determine the volume of the contents according to the provisions of GB/T6752, and then calculate the volume percentage of the contents in the container according to formula (1), V (%). V(%)=
Wherein: V1——the volume of the sample in the container, mL; V2—the volume of the packaging container, mL.
HG/T2592-94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item Article
Item Article
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction Reference
(Reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".mL; V2—volume of packaging container, mL.
HG/T2592—94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item clause
Item clause
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparencybzxZ.net
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction reference
(reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".mL; V2—volume of packaging container, mL.
HG/T2592—94
Appendix A
Product quality inspection cycle
(Supplement)
The test items specified in the technical requirements of this standard, the required sample substrate, size, quantity and test cycle are shown in Table 1 and Table 2A1
Item clause
Item clause
Applicability
Appearance of paint film
Drying time
Re-adhesion
Heat resistance
Water resistance
Boiling water resistance
Resistance to volatile solvents
Original paint color
Original paint transparency
Applicability
Non-volatile content
Drying time
Appearance of paint film
Adhesion
Heat resistance
Water resistance
Tinplate
Glass plate
Tinplate
Glass plate
Glass plate
150×70×0.2~0.3
200×100×23
120×50×0.2~0.3
150×70×2~3
150×70×0.45~0.55
150×70×2~3
150×70×0.45~0.55
0 1/20 5/k 9
Amount (piece)
Period (day)
24 -28
0 a501u5-a
Item
Boiling water resistance
Solvent oil resistance
Test of nitro group in solvent soluble
HG/T2592-94
Continued Table 2
Period (day)
0-0 151A-5 2
o.250.p42
Note: ① Symbol description: X sampling, O paint film preparation: evaluation, ② The numbers in the cycle column represent time, the unit is h. Placement, - heating - ·→ test plate common, △ - other operations. Appendix B
Construction reference
(reference)
B1 If there are any foreign mechanical impurities before use, they must be filtered. B2 Before using nitro varnish, the surface of the wood should be treated in advance to make the surface smooth and clean, free of oil, wax, wood hair and other dirt. It is suitable for use with nitro lacquer.
B3 The construction method is mainly spraying, but it can also be brushed and finger-coated. Use nitro lacquer thinner to dilute to a suitable construction viscosity. During construction under humid climate conditions, if the paint film is found to be whitish, a proper amount of nitro lacquer moisture-proof agent can be added to adjust it. B4 The paint film of nitro varnish should be suitable for sand wax and polishing with light wax. During construction, the interval between two coatings should be about 10 minutes. B5 Nitro varnish should comply with relevant national regulations in terms of labor protection, safety, and hygiene during the coating operation. Additional notes:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by Jinhua Paint Factory and the Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wu Ronggen, Fei Jinhao, Dong Zhangyu, Liu Jiyuan and Shi Zhaohui. This standard is equivalent to the Japanese Industrial Standard JIS K5531-85 "Nitro Spray Paint".
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