Paint coating engineering DIY construction skills

1. Factors that affect the effect of matte finish

With the paint, increase the amount of curing agent, the gloss increased. On the contrary, reducing the amount of curing agent, the gloss will be reduced. Increase the amount of diluent, paint leveling is good, thin spray can, reduce the gloss. On the contrary, to reduce the amount of dilution, poor leveling of the paint, thick spray must be used, and the gloss is increased, that is, the coating is thick and shiny, the coating is thin, and the gloss is low. Whether the gloss of the substrate is high or low, as long as the matte finish is applied, You get a matte effect, sprayed with bright varnish, you get a bright light effect.

2. Prevention and treatment of pinhole browns

There are a lot of factors that cause pinholes in brownies. The main points are: Humidity in the construction environment is too high. The water content of paint curing agent or diluent is too high, the substrate does not contain water, the amount of curing agent is large, and the amount of diluent is too small. The substrate is not sealed, there are gaps on the surface of the stickers and solid wood furniture, generally can not be directly above the paint, you must first on a closed paint. Once the coating is too thick, the temperature is too high, the dry speed is too fast, the surface is dry, and the inside is not dry (continuous gaps are short for the two spits and the bottom layer is not dry).

Treatment of pinhole browns: If pinholes occur, apply a bright or matt varnish after water-drying. If the primer appears brown, polish it as deep as possible and re-spray the primer. Above, but do not spray too thick at one time; if the topcoat appears brown, you can directly spray the crystal clear paint over and over again until the varnish completely covers the brown seed. Another method is The granules are polished as deep as possible, and then the crystal clear paint is diluted to a very thin (1.5-2.5 times the amount of diluent added). The paint has a low viscosity and easily permeates into the roots of the brown seeds and fills the holes.

3, leveling and sagging:

Leveling, sagging related to the viscosity of the paint, the addition of a large amount of diluent, paint viscosity is low, good leveling, but the spout is easy to sag; on the contrary, the thinner to add less paint viscosity, poor leveling However, the facade is not easy to hang; The gun has more oil, and the facade is easy to hang; the film is thin, not sagging, but it is difficult to level; fast dry, difficult to level, not sagging; dry speed is slow, Leveling is good, easy to hang.

4. Disposal methods, also known as poor oil and adhesion:

Thoroughly clean the substrate and scrub the substrate with thinner. Also, the substrate can be properly ground.

5, dust particles appear on the film:

Clean the spray room and drying room, seal properly, clean the substrate, properly sprinkle water on the moving floor, keep it moist, filter it with a finer filter, and polish the surface with water. , may also consider adding topcoat.

6, whitening method:

When the weather is high in humidity, varnish, floor paint, matt varnish and other top coats are prone to white paint. The usual solution is: use slow-drying thinner and add 5%-15% of white water in the paint or thinner to stir and spray; but if the humidity is too high, there is still whitening after adding the white water. Stop construction.
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