Paint knowledge: Top 10 precautions for paint construction

Core tips: 1 Paint peeling: it may be caused by too smooth surface If the original paint is glossy or powdery (with untreated color 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 areas of paint peeling, can be polished with spinning paper, then apply putty, brush primer, and then paint again The paint must be stripped and repainted in case of large area falling off 2 Blistering of paint: first, puncture the blister If there is water coming out, it means that there is moisture infiltration under or behind the paint layer After the sun, the water evaporates into steam, and 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 Paint Home News: 1 Paint peeling: it may be caused by too smooth surface If the original paint is glossy or powdery (with untreated color 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 areas of paint peeling, can be polished with spinning paper, then apply putty, brush primer, and then paint again The paint must be stripped and repainted in case of large area falling off 2 Blistering of paint: first, puncture the blister If there is water coming out, it means that there is moisture under or behind the paint layer After the sun, the water evaporates into steam, and the paint skin will be blistered At this time, first remove the starting paint with the hot air gun, 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 apply microporous paint directly after scraping off the paint skin without filler 3 Cracks: in this case, 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, then 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 Flow of paint: if the paint is applied too thick at one time, it will flow Brush off the paint before it is dry If the paint has begun to dry, wait until it is completely dry, use spinning paper to polish the paint surface, brush the surface clean, and then wipe it with a wet cloth, and then re apply the outer layer paint Pay attention not to brush too thick 5 Mildew and discoloration: this kind of problem often occurs on wet paint surfaces, such as water vapor condensation on glass and metal surfaces, which often produces brownish 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 6 Spot: there are many reasons for the spot on the surface of paint For example: the water in the emulsion paint dissolves the substances on the wall and rusts the paint surface The wall surface rubbed with steel wool will produce rust spots The leakage of concealed pipe in the wall is stained 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 7 Tarnish: the reason is that the primer is not applied, or the primer and inner layer paint are directly applied with varnish before they are dry As a result, the varnish is absorbed by wood and tarnish There is also a reason why varnish is not good 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 Wrinkle of paint film: it is usually caused by painting the second coat before the first coat 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 before the second 9 Rough surface: the rough surface of a new paint, usually due to the unclean brush used or the pollution of the surrounding environment It may also be that the paint is mixed with paint skin, which has not been precipitated or 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 The old paint must be filtered with paint filter paper or clean nylon stockings before use In addition, when the paint is not dry, the painted surface shall be covered with a cover or cardboard 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 Paint is not dry: if the indoor ventilation is not good or the temperature is too low, the paint will dry slowly At this time, all doors and windows can be opened to promote ventilation, or a heater can be placed indoors to increase room temperature If the problem still cannot be solved, it may be that the painted surface is greasy At this time, the paint can be removed by chemical paint remover or heating, and the surface can be cleaned thoroughly and then repainted Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,