Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2245—91
Nitro pencil lacquers of various colors
Issued on November 12, 1991
Ministry of Chemical Industry of the People's Republic of China
Implementation on July 1, 1992
W Chemical Industry Standard of the People's Republic of China
Nitro pencil lacquers of various colorsbzxz.net
Subject content and scope of application
HG/T2245—91
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, storage and transportation of nitro pencil lacquers of various colors. This standard applies to the decorative protective coating on the surface of wooden pencil barrels. 2 Reference standards
GB1727
GB1735
GB1764
GB3186
GB5208
GB6751
General preparation method for paint film
Determination method for heat resistance of paint film
Determination method for paint film thickness
Sampling of paint products
Determination method for flash point of paint Rapid equilibrium method
Determination of volatile and non-volatile matters in paints and varnishes GB6753.2|| tt||Paint surface drying test
GB9271
GB9278
GB9761
Determination of paint flow time
Standard test panel for paints and varnishes
Small glass ball method
ISO flow cup method
Temperature and humidity for condition adjustment and test of paint samples Visual colorimetry of paints
GB/T13452.1 Paints and varnishes
Determination of total lead content Flame atomic absorption spectrometry 3 Technical requirements
The product should meet the technical requirements in the following table.
Coating color and appearance
Flow time (No. 6 cup), s
Drying time, min
Heat resistance (45±2℃, 30min)
Non-volatile matter content, %
Other colors
Flash point, ℃
Total lead content, %
4 Test method
4.1 General conditions of the test
4.1.1 Sampling shall be carried out in accordance with GB3186.
Not less than
Not greater than
Not less than
Not less than
Not greater than
Conform to the standard sample and color difference range, the paint film is flat and smooth 25
The paint film has no cracks
4.1.2 The temperature and humidity of the coating sample state adjustment test shall be in accordance with GB9278. 4.1.3 Standard test panels for paint and varnish shall be prepared in accordance with GB9271. Approved by the Ministry of Chemical Industry of the People's Republic of China on November 12, 1991 and implemented on July 1, 1992
W.bzsoso:comHG/T2245-91
4.1.4 The general preparation of paint film shall be carried out in accordance with GB1727, and in arbitration in accordance with GB6741. 4.1.5 The thickness of paint film shall be measured in accordance with GB1764. 4.2 The color and appearance of paint film
shall be evaluated in accordance with GB9761.
4.3 Flow time
shall be tested in accordance with GB6753.4, using X-1 nitro lacquer thinner and the sample at a ratio of 1:1 (m/m). 4.4 Drying time
shall be measured in accordance with GB6753.2.
4.5 Heat resistance
Test according to GB1735.
4.6 Non-volatile content
Measured according to GB6751.
4.7 Flash point
Measured according to GB5208.
4.8 Total lead content
Measured according to GB/T13452.1 Determination of total lead content in paints and varnishes. 5 Inspection rules
5.1 All technical requirements listed in this standard are type inspection items. Among them, the color and appearance of the paint film, outflow time, drying time, heat resistance, and non-volatile content are factory inspection items. Under normal production conditions, type inspection shall be carried out at least once every six months. 5.2 The product shall be inspected by the inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory shall meet the technical requirements of this standard. The product shall have a certificate of conformity, and instructions for use and precautions shall be attached when necessary. 5.3 The receiving department has the right to inspect the product according to the provisions of this standard. If the quality is found not to meet the technical indicators of this standard, the supply and demand parties shall jointly re-sample and re-test according to GB3186. If it still does not meet the technical requirements of this standard, the product is unqualified and the receiving department has the right to return it.
5.4 The product shall be sampled according to GB3186, and the sample shall be divided into two parts, one of which shall be sealed and stored for one year for future reference, and the other shall be used as an inspection sample. 5.5 The product packaging, quantity and marking shall be checked and verified before leaving the factory. If the packaging is damaged or leaking, the quantity is inconsistent, or the marking does not meet the requirements, it shall be handled in time.
5.6 When the supply and demand parties have a dispute over the product quality, the product quality supervision and inspection agency shall perform arbitration inspection. 6 Packaging marking
Carry out according to the provisions of GB9750.
7 Packaging, purchase, storage and transportation
7.1 The product shall be stored in a clean, dry and sealed container, and the filling volume shall not exceed 95% of the volume. The product should be stored in a ventilated, dry place, and protected from direct sunlight. It should be isolated from fire and away from heat sources. When the temperature is too high in summer, efforts should be made to cool it down. 7.2 The product should be protected from rain and sunlight during transportation, and should comply with relevant regulations. 7.3 The product has an effective storage period of one year from the date of production under the storage conditions in accordance with Articles 7.1 and 7.2. 7.4 If the storage period is exceeded, it can be tested according to this standard. If the results meet the requirements, it can still be used. 8 Safety and health regulations
The paint contains nitrocellulose and organic solvents such as esters, ketones, and alcohols. It is a flammable liquid and has certain toxicity. Attention should be paid to ventilation at the construction site, and measures such as fire prevention, anti-static, and prevention of poisoning should be taken, and the safety regulations and relevant regulations for coating operations should be observed. 2
WHG/T2245—91
Appendix A
Construction reference
(reference)
A1 The surface of the object to be coated should be treated in advance. To increase the adhesion of the paint film. A2 The construction should be carried out according to the pencil paint construction process, and the thinner can be X-1 nitro paint thinner. In case of rainy and humid weather, when the paint film turns white, in addition to adding a small amount of F-1 nitro paint moisture-proof agent, the indoor temperature and exhaust can also be appropriately increased to solve the problem. A3||tt| ... 3
W.
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