Some standard content:
Light Industry Standard of the People's Republic of China
Lacquer Art Furniture
1 Subject Content and Scope of Application
This standard specifies the basic technical requirements and testing methods for lacquer art furniture. This standard applies to all types of lacquer art furniture.
2 Reference standards
GB/T1727 Paint film preparation method
GB/T1730 Paint film hardness determination method Pendulum damping test GB/T 1732 Paint film impact resistance determination method
GB/T1748 Putty film flexibility determination method
GB/T1762 Paint film back adhesion determination method
GB/T1763 Paint film resistance to chemical reagents determination method GB/T3324 Wooden furniture
GB/T4893.4 Furniture surface paint film adhesion cross-cut determination method 3 Terminology
3.1 Gray material
Paste prepared with paint or adhesive, filler, etc. Synonym allowed: putty.
3.2 Gray ground
Coating obtained by coating and drying gray material. 3.3 Warp
Overall flatness of the product (component) plane (in accordance with the definition of "warp" in GB/T3324). 3.4 Flatness
Local flatness of a product (component) plane (in accordance with the definition of "flatness" in GB/T3324). 3.5 Perpendicularity of adjacent edges
QB/T 3644--1999
Describes the degree of irregularity of the rectangular surface (component) of the product (in accordance with the definition of "perpendicularity of adjacent edges" in GB/T3324). 3.6 Gray engraving
A decorative technique of using a tool to carve a pattern on a lacquer with a certain thickness, and then coloring or gilding. Allowed synonyms: lacquer engraving.
3.7 Flat grinding
A decorative technique in which shells, metals, stones, etc. are processed and glued to the tire, and then polished to the same level as the paint layer after several times of plastering and painting, and then the patterns are cut. 3.8 Inlay
A decorative technique in which decorative materials such as ivory, jade, and stone are processed by carving and then embedded or glued to the tire. Approved by the Ministry of Light Industry of the People's Republic of China on November 4, 1989 and implemented on May 1, 1990
3.9 Carved lacquer
QB/T3644-1999
A decorative technique in which various patterns and pictures are carved on the tire with a certain thickness of paint layer. 3.10 Color painting
A decorative technique in which pictures are created on the tire with paint. 3.11 Carving and filling
A decorative technique that uses a knife to draw lines and patterns on the paint surface, and then fills in colored paint or gold. 4 Product classification
According to the decorative process, it is divided into: inlay, plastering, flat grinding, painting, lacquer carving, carving and filling, etc. 4.1
4.2 Specifications
4.2.1 Common sizes of screens:
915mm×255mm×(10~30)mm;
b.1 620mmX305mmX(10~30)mm;
1 830mm×408mm×(10~30)mm;
2 134mmX408mm×(10-~30)mm.
Other products are determined according to market demand.
5 Technical requirements
5.1 Main raw materials
Wood, ash, paint, other decorative materials. 5.1.1 The allowable defects of wood materials shall comply with the provisions of Article 3.3.2 of GB/T3324-1982. 2 The provisions of ash physical and chemical properties are shown in Table 1.
Flexibility, mm
Impact strength, kg·cm
Heat resistance, h
Bond strength, N/cm2
Note: If the ash adopts dry grinding process, water resistance is not required. 5.1.3 The provisions of paint physical and chemical properties are shown in Table 2. Item
Impact strength.kg·cm
Corrosion resistance
Adhesion, grade
Return viscosity, grade
5.2 Woodworking process requirements and surface quality
No corrosion after the test of 6.1.5
1h, no falling
QB/T 3644—1999
Should meet the requirements of 3.4.1, 3.4.3, 3.4.5.2 and 3.4.5.3 in GB/T3324--1982. 5.3 Finished product requirements
5.3.1 Gloss
Gloss is divided into three types according to high gloss, medium gloss and low gloss, and should meet the requirements of Table 3. Table 3
5.3.2 Appearance requirements of visible surface coating (except antique products): smooth and flat, uniform color, no obvious color difference, no brushing, sagging, wrinkled paint, and exposed bottom. 5.3.3 No obvious peeling, cracks, or external injuries are allowed. 5.3.4 Component matching
5.3.4.1 The tolerance of the main dimensions of the product is 10mm (the limit deviation is ±5mm). 5.3.4.2 The shape and position tolerances are specified in Table 4. Table 4
Warp Aa
Flatness
Verticality of adjacent edges Ac
Diagonal length
Diagonal length
The gaps between drawers and doors should not exceed the provisions of Table 5. Specification
700～1400
≥1000
5.3.4.4 Drawers, doors, etc. should be flexible to open and close. 5.4 Accessories installation
35%~80%
Left, right
5.4.1 All accessories should be installed tightly, correctly and firmly; there should be no broken or loose joints; there should be no missing parts, missing nails or nail penetration. 5.4.2 Doors, crown pins and decorative parts must be of consistent specifications, accurately positioned, symmetrically fit, flat and firm. 5.5 Decorative craftsmanship requirements
5.5.1 Inlay
Color matching is coordinated, the carving texture is clear, the layers are distinct, the polishing is smooth, the inlay is tight, and the attachment is firm. 5.5.2 Paint engraving
The knife technique is varied, the lines are smooth; the ground is flat, the color is harmonious, the polishing is uniform, the gold is firmly pasted, and the gold color is uniform. 5.5.3 Flat grinding
QB/T 3644--1999
The material is flat, the joints are tight, the pattern is accurate, the lines are smooth, the paint surface is flat, and the grinding is clear. 5.5.4 Painted
The color matching is reasonable, the color is smooth, the decoration is clear, and the lines are smooth. 5.5.5 Carved lacquer
The ground is flat, the decoration is regular, the knife technique is round, and the layers are clear; the grinding is skillful and the color is bright. 5.5.6 Carved and filled
The knife technique is smooth, the color is harmonious, the color is smooth, and the gold is full. 5.6 Major defects and minor defects
5.6.1 See Table 6 for major defects.
5.6.2 See Table 7 for minor defects.
Glossiness does not meet the requirements of Table 3
Paint surface is not smooth and flat
Color is uneven
Obvious color difference
Warp does not meet the requirements
Flatness does not meet the requirements
Verticality of adjacent edges does not meet the requirements
Drawer joints do not meet the requirements
Door joints do not meet the requirements
Portable doors are not flexible to open and close
Accessories are not installed tightly, properly, or firmly. Joints are broken or loose
Missing parts, missing nails, nail penetration
6 Test methods
6.1 Material test
6.1.1 Flexibility of gray floor
Specifications of door, drawer pins and decorations are inconsistent||tt ||Doors, drawers and accessories are not positioned accurately, and the asymmetrical doors, drawer pins and accessories are not flat and firm
Color matching is not harmonious
The carving texture is not clear, the layers are not clear, the polishing is not smooth, and the inlay is not tight
The attachment is not firm
The coloring is not harmonious, the polishing is unevenbzxZ.net
The gilding is not firm, the gold color is not uniform
The joints are not dense
The pattern is not accurate, the lines are not smooth
The polishing is not clear
The color is not smooth, the lines are not smooth, the decoration is not clear, the ground is not flat, the decoration is irregular
The polishing is not proficient, the color is not smooth
The knife technique is not smooth
The gold is not full
Measured in accordance with GB/T 1748.
6.1.2 Impact strength of ash ground
QB/T 3644--1999
Replace the thin steel plate used for putty sample preparation in GB/T1732 with a tinplate plate with a thickness of 0.2-0.3mm, and the rest shall be carried out in accordance with the provisions of GB/T1732.
6.1.3 Heat resistance of ash ground
Make the plate according to the coating method in GB/T1727. Put the dried ash ground sample into the upper part of the blast drying oven at a temperature of (50±1)℃ (with blasting on) for 3 hours. Observe with a 4x magnifying glass, and pass if no cracks are generated. 6.1.4 Bonding strength of ash floor
The load selection of the tensile testing machine should be adapted to the load of the sample. The tensile wood block should be a dry ash wood block. The bonding surface of this block is coated with ash material, and the thickness after drying is (500 ± 20) μm. The sample is bonded with adhesive. After it solidifies, it is pulled apart with a tensile testing machine until it is destroyed. The bonding strength of the ash floor is calculated according to formula (1): F
Where: F
Bonding strength of ash floor, N/cm\;
GLoad when the sample is pulled apart and destroyed, N;
SBearing area, cm.
(1)
Each group of tested samples should be no less than 5 pairs, and the arithmetic mean of at least 3 pairs should be taken as the test result. The error between the F value of each pair of samples and the arithmetic mean value does not exceed ±15% to be valid. 6.1.5 Water resistance of gray ground
Make the board according to the scraping method in GB/T1727-1979. After drying, soak it in distilled water at (25±1)℃ for 1h, take it out and observe. 6.1.6 Impact strength of paint film
Measured according to GB/T 1732.
6.1.7 Corrosion resistance of paint film
Measured according to Method B of 3(2) of GB/T1763: Heated salt water resistance method. 6.1.8 Adhesion of paint film
Measured according to GB/T4893.4.
6.7.9 Hardness of paint film
Measured according to GB/T1730.
6.1.10 Adhesion of paint film
Measured according to GB/T1762.
6.2 Finished product test
6.2.1 Glossiness
Use GZ-11 photoelectric gloss meter to take five points on the non-decorated part of the visible surface of the product for gloss test. The placement direction of the gloss meter is consistent with the grinding direction, and the arithmetic mean of the test data is taken as the test result. 6.2.2 Main dimensional tolerances
Shape and position tolerances, drawer and door gaps, shall be measured in accordance with the provisions of 4.1 to 4.5 of GB/T3324-1982. 6.2.3 Inspection of appearance allowable defects and decorative process Under natural light, hand touch and visual inspection shall be carried out piece by piece at a distance of 0.5m from the workpiece. 7 Inspection rules
7.1 Factory inspection
Products shall be inspected piece by piece by the factory inspection department in accordance with this standard. Products that meet the requirements of this standard are qualified products, and those that do not meet the requirements of this standard shall be repaired and re-inspected.
7.2 Type inspection
7.2.1 Judgment rules
QB/T 3644--1999
7.2.1.1 Products with one defect in Table 6 shall be deemed unqualified. 7.2.1.2 Products with five defects in Table 7 shall be deemed unqualified. 7.2.1.3 When the unqualified rate of the first random inspection is 40%, double random inspection shall be conducted. When the unqualified rate of the double random inspection is 40%, the batch of products shall be deemed unqualified. 7.2.1.4 Sampling rules
For the first random inspection, 5 pieces (sets) shall be sampled from no more than 100 pieces (sets), and 5% shall be sampled from more than 100 pieces (sets). 8 Marking, packaging, transportation, storage
8.1 Marking
The name of the manufacturer, product name, specifications and date of manufacture shall be indicated on the finished products before they leave the factory. 8.2 Packaging
According to the agreement between the supply and demand parties.
8.3 Transportation and storage
The product should be padded during transportation. It should be handled and loaded with care. Avoid collision and prevent rain and exposure. The product should be stored in a dry and ventilated place. It should not be exposed to the sun or rain. Padding should be added when stacking. The stacking should not be too high or too heavy to prevent damage. Avoid contact with corrosive substances.
Additional instructions:
This standard was proposed by the Ministry of Light Industry of the People's Republic of China. This standard was drafted by the National Lacquerware Quality Inspection Center. The main drafters of this standard are Zhu Jun, Ding Minshun, and Li Xuelei: 408
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