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    Home > Coatings News > Paints and Coatings Market > Paint knowledge: how to solve different paint problems?

    Paint knowledge: how to solve different paint problems?

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: many owners will slowly find that the wall surface of the house begins to expose some quality problems later, which affects their home environment Therefore, when decorating new houses, standardized construction is the top priority of home decoration, and the craftsmanship of the master is particularly important Today, let's talk about how to solve the following problems when painting the wall 1 Paint peeling may be caused by too smooth surface If the original paint is glossy or powdery (with untreated paste paint), the new paint will not stick firmly on the surface Or it may be rotten wood or rusty metal, or peeling due to poor paint quality Small area of paint peeling, can be Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of paint news: many owners will slowly find that the wall of the house begins to expose some quality problems later, which affects their home environment Therefore, when decorating the new house, standardized construction is the top priority of home decoration, and the craftsmanship of the master is particularly important Today, let's talk about how to solve the following problems when painting the wall 1 Paint peeling may be caused by too smooth surface If the original paint is glossy or powdery (with untreated paste paint), the new paint will not stick firmly on the surface Or it may be rotten wood or rusty metal, or peeling due to poor paint quality In case of peeling off of small area of paint, first polish with fine sandpaper, then apply putty, brush primer, and then paint again The paint must be scraped off and repainted in case of large area peeling 2 First of all, the paint blisters shall be punctured If there is water coming out, it means that there is moisture under or behind the paint layer Once it is exposed to the sun, the water will evaporate into vapor, which will make the paint skin blister At this time, first use the hot air gun to remove the foaming paint, let the wood dry naturally, then brush the primer, and finally paint the whole repair surface again If there is no water in the bubble, it may be wood grain cracking There is a small amount of air in the bubble When the air expands in the sun, the paint will bulge In the face of this situation, first scrape off the blistering paint skin, then fill the cracks with resin filler, paint again, or without filler, after scraping off the paint skin, directly apply microporous paint 3 In case of cracks, chemical paint remover or hot air spray gun shall be used to remove the paint and then paint again If the fracture range is not large, at this time, it can be moistened with sand grinding block or dry and wet sandpaper to remove the broken paint After the surface is polished smooth, apply putty, brush primer and paint again 4 The paint runs If the paint is too thick at one time, it will flow The paint can be brushed with a brush before it is dry If the paint has begun to dry, it should be allowed to dry completely Polish the paint surface with fine sandpaper, brush the surface clean, wipe it with a wet cloth, and then apply the outer layer of paint again, taking care not to brush too thick 5 There are many reasons for stains on the paint surface For example: the water in the emulsion paint dissolves the substance on the wall and rusts the paint surface, the wall surface rubbed with steel wool will produce rust spots, and the leakage of concealed pipes in the wall will produce stains, etc In order to prevent stains, a layer of primer containing aluminum powder can be brushed first If there are stains, the latex paint at the spots can be removed first After brushing the primer containing aluminum powder, paint again 6 The problem of mildew and discoloration often occurs on the wet paint surface For example, water vapor condensation on the glass or metal surface will often produce brown black stains At this time, fungicide can be used to treat the moldy parts according to the instructions in the manual After the mold is killed, clean the surface, and then paint again 7 The reason for the loss of luster is that the primer is not applied, or the primer and inner layer paint are directly applied with gloss paint before they are dry As a result, the gloss paint is absorbed by wood and loses luster The poor quality of varnish is also a reason Use dry and wet sandpaper to grind off the old paint, brush off the dust, clean the surface with a clean and wet cloth, and then brush the paint again after it is completely dry Special attention should be paid to the fact that when the paint is applied in a low temperature environment, the paint film may lose luster after drying 8 The wrinkle of the paint film is usually caused by painting the second time before the first time is dry At this time, the solvent in the lower paint will affect the upper paint film, making it wrinkle In this case, chemical mercury remover or heating method can be used to remove wrinkled paint film and repaint Remember, you must wait for the first coat to dry out before you apply the second coat 9 The surface of the new paint is rough, which is usually caused by the unclean paint brush or the pollution of the surrounding environment It may also be that the paint is mixed with paint skin, which has not been precipitated and filtered before use, or the paint has been stained with dust when it is not dry In order to prevent the above problems, clean paint brush and paint barrel must be used Before using the old paint, be sure to filter it with paint filter paper or clean nylon stockings In addition, the painted surface should be covered with a cover or cardboard when the paint is not dry to prevent dust If the paint surface is rough, after it is completely dry, polish it with dry and wet sandpaper, wipe it clean, and then brush the paint again Pay special attention to that the paint brush must be clean 10 The dark spots on the surface of the painted wood may be caused by the fact that the wood knots are not sealed before painting and the resin seeps out of the wood knots when they are heated by the sun At this time, the paint can be scraped off with a scraper, and then polished with fine sandpaper to expose the wood joint Seal the wood joint with sealing paint, and then paint again after it is completely dry 11 If the paint is not dry, the indoor ventilation is poor or the temperature is too low, the paint will dry slowly This is to open all doors and windows to promote ventilation, or put a heater in the room to increase the room temperature If it still fails to solve the problem, it may be that the painted surface is greasy The paint can be removed by chemical paint remover or heating method, and the surface can be completely wiped clean before repainting 12 Try to remove the bug on the paint surface while the paint is not dry, and then touch up the surface with a little oil with a brush If the paint is starting to dry, wait for the film to harden completely, and then wipe off the bug, so as not to mess up the surface The above 12 items are the problems often encountered in the use of paint You can refer to these methods to solve the problems in the use of paint in the decoration work I hope the above introduction can bring you some help Home of coatings focuses on coatings, paint coatings, coating technology, news and information of fire retardant coatings, coatings, coating technology, decoration knowledge and decoration renderings of fire retardant coatings,
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