Sheet processing part:
1. In the effect of transparent varnish decoration, why should I brush the paint before doing woodwork?
Answer: 1After painting the plate, the color of the wood itself can be displayed, which is convenient for the woodworker to match the color when affixing the board, so as to avoid the color difference of the board on the same panel. 2 The protective sheet is not polluted during the processing, and it is easy to clean the stain when painting.
2, the difference between transparent putty and nail hole treasure:
Answer: Transparent putty is suitable for the filling of wooden eyes. If it is used for the filling of nail holes, it will be easy to sag and affect the effect. Nail hole treasure can be used as nail hole filling, and can also be used as wooden eye filling and filling effect. Good, not easy to sag and not easy to yellow, but nail hole treasure for wood eye filling, the wooden path putty should be polished.
3. The difference between atomic ash and water ash:
A: Both are ideal filling materials for wooden holes and wooden seams, but the dry weight of the atomic ash is fast, it is not suitable for large-area construction, and it must be used with the adjustment; the dry ash is slow and the application range is wider, which is a large area. The ideal material for filling wooden eyes.
4. Why is it suitable to use water ash instead of nitro transparent putty in the solid color lacquer process:
A: Because the water ash is not easy to sink, the filling effect is good; and the nitro putty is easy to sink, the filling effect is poor, and it is easy to bite the bottom yellow. However, the adhesion and toughness of the water ash is poor, and the water ash should be thoroughly cleaned.
5. Why should the dark plate be coated with transparent putty not too thick?
Answer: Because the transparent putty is milky white or milky yellow translucent liquid, if the dark plate is made of transparent putty, the thick coating will be thick and the thickness will be uneven, which will result in whitening of the coating film and uneven color.
6. Why is it best to use a primer to fill in the paint process?
A: Because the main function of the primer is to fill in, it has excellent filling and grinding properties, it is easy to fill the substrate by grinding, and the cost is low. If the top layer is filled with a top coat, the filling effect is poor, and the cost is high, and it is difficult to construct and difficult to polish. If it is filled with a transparent putty, the transparency is extremely poor, and the thickness is not uniform, causing uneven color or even whitening, and it is easy to cause the topcoat to bite.
7. Why does the bottom coloring process not use transparent putty to fill the wood eye?
A: The use of transparent putty before coloring will make the board not colored; and if the transparent putty is applied after coloring, the poorly-polished putty will affect the coloring effect, so the primer should be used to fill the wooden eye in the coloring process.
8. The difference between the bottom of the Depot seal and the primer closure:
Answer: The bottom of Depot is better than the primer. After the film formation, the bottom depot is more tightly combined with the wood, and the sealing effect is better. The effect of water and oil separation is also stronger.
9. What is the difference between making a bottom and a treasure on a primer and an oily putty?
Answer: Bottom treasure is made on the primer and oily putty. The bottom treasure is not in direct contact with the plate. The bottom treasure does not penetrate into the plate, and the sealing effect is poor. On the white blank, the bottom is made of Depot, and the bottom Depot is fully infiltrated into the plate. The sealing effect is good. Therefore, the correct way is to first close the plate with the bottom of the treasure, and then use putty to fill the hole, nail holes, and then primer.
10. Why do you need to use the bottom treasure to seal the sheet?
Answer: The wood itself contains a certain amount of water and oil. After the coating, the water will evaporate and the oil will evaporate, causing the coating to become white and fall off. The wood is loose and will deform over time, causing the film to fall off and crack. Wood is a fibrous structure, while a typical primer contains more filler and the adhesion between the board and the primer is relatively poor. The use of Detroit can solve these three problems. The bottom of the Depot will fully penetrate the plate, which will block the overflow of water and oil. The bottom tote has better toughness and will reduce the influence of wood deformation. The bottom Depot and the plate are attached. Strong force, improve the adhesion of the upper paint film and the board.
11. Why do you want to control the moisture content of wood? How to control the moisture content of wood?
Answer: Because wood is a porous hygroscopic material, the moisture content not only affects the warping and cracking deformation during the use of furniture, but also has a great influence on the painting operation, especially in the finishing double group. When the PU polyester lacquer is used, a large amount of air bubbles are generated during the coating process due to the high moisture content of the wood. Therefore, it is necessary to control the moisture content of wood. The standard moisture content in Japan is set at 15%, and the standard moisture content in Europe and America is 12%. The maximum moisture content of furniture materials in China is as follows. In actual use, it should be controlled below the specified value. %, if you can control it at 10~12% is more insurance. In addition, if the poor drying of wood affects the coating and coating: 1 whitening occurs during coating; 2 the coating is released due to moisture, causing cracks, ridges, peeling, poor adhesion, whitening; 3 white coating The fog is not clear; 4 the film is not completely dry, loses luster; 5 the film is prone to bubbles, pinholes; 6 water is too high to produce film shrinkage, oil and other phenomena; 7 shrinkage discoloration, color is not clear; The occurrence of decaying bacteria, mold and discoloring bacteria; 9 the products after painting may also cause anti-warping or twisting.
Table of the highest moisture content of materials used in various regions of the country (%)
Area/Category North China Northeast China East Central South West Southwest Northwest Rubber Assembly 10 12 18 20 15 12
Other components 14 15 20 22 18 15
Bed board 18 20 —— —— —— 20
12. What is the effect of shrinkage and expansion of wood? How to avoid its impact?
A: The deformation caused by the shrinkage and expansion of wood has a great influence on the coating film. The most common phenomena are warpage and cracking. Ways to mitigate such effects include: 1 using dried wood with appropriate moisture content, insurance moisture content of 10 to 12%; 2 using less deformed diameter cutting material; 3 using less dense material; 4 Apply wax to seal the surface of the wood to prevent moisture absorption and evaporation.
13. How to color water-based putty?
Answer: When using water-based putty to fill holes and fill seams, it should be color-coded according to the color of the substrate. The coloring materials can be water-based color paste and inorganic iron oxide pigments such as iron red, iron yellow, and iron blue. When the color of the selected plate is wet, the intermediate color of the wooden path and the wooden eye is shallow.
14. Why should the white blank be polished and decontaminated before the construction of the board?
Answer: The wood is made of fiber structure, with wood wool and wood thorn on the surface. Therefore, it has to be polished. The plate is polished to achieve smooth and smooth hand feeling, which can make the color of the painting clear and the wood grain clear. It can also save the coating material and improve the coating film. quality. Stains on the board, such as glue marks, oil marks, dirt, etc., will affect the uniformity of the decorative color, the drying of the paint and the adhesion of the film, so it must be cleaned before painting. The white blank finishing is generally polished with 320# sandpaper, and if necessary, it can also be scrubbed with a thinner or scraped with a blade.
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