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Basic PU painting process

Step 1: After sanding is required, depending on the paint color required to have raw fiber or paint balls that decide whether to powder or not. However, most of the Pu paint systems use a glossy finish. When making dregs, also note on the specimen that requires the appearance of wood veins. Whenever possible, the powder must be a pigment (usually black or brown powder). This step is necessary to fill the heart of wood as well as the defects on the surface. Failure to do this will cost you a lot of effort and material to seal the gaps after application.

Step 2: Since the wood is different from the color of the metal is not uniform, so it is necessary to have the steps to modify the background color of the wood. The coloring depends on the color as well as the type of wood used.

Step 3: First coat (siller). This is a colorless paint, usually mixed in a ratio of 2: 1: 3 (2 lining: 1 hardness: 3 petrol) ==> This ratio can also be used to reduce or add other additives to regulate Adjust the evaporation rate of the paint. In hot weather conditions, rapid evaporation will cause the paint surface to suffer from heart or worse air bubbles, which will take a lot of effort to repair. At this step was filled with wood hearts. If done well, with small timbers and have made good pastes, it may take only one primer step to reduce costs, materials and labor. Step by step sanding (siller) need to sand, filling the remaining defects.

Step 4: Paint color 1. Color mixing by experienced painters. In order to avoid uneven or overly colored colors, this one coat only covers about 90% of the required color.

Step 5: Paint the second time, finishing 100% of the required color. In this painting the painter will paint darker than the missing spots. At this stage it is necessary to arrange experienced painters to perform.

Step 6: Primer 2. This coat is just thin enough to keep the paint free from abrasion when sanding, as well as the remaining fillings, the primer, after sanding to 100 % surface and no defects. Sanding required, check for defects if there is a last time before applying (gloss or matte)

Step 7: Spray the coating (gloss or matte) according to the chosen paint coat (gloss or matte). Usually, the proportion of ingredients used must be in the ratio of 2: 1: 3 (2 coats + 1 or 2.5 or 3 solvents). experience and experience of the painter. Note, in addition to bubbles with lining, if in the early morning, in the fog is very glossy paint mist is easily blurred by saturating the water vapor on the paint surface, so need to add additives to slow the evaporation rate. This is the finishing coat that determines the quality of the paint so the technician should have experience in performing this step. The condition of the paint room must meet the requirements of no dust, especially for products requiring high gloss.

Key words: wood painting techniques, pu wood paint, basic PU wood painting techniques


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