When using latex paint, the quality of the latex paint itself and the brushing problem should be applied. The latex paint wall often has such problems:
Dulux ( Western Chemicals ) Â Â Ivy paint
Powdering
Cause: Due to the poor weather resistance of some of the main components of low-grade latex paint, if the wall is not treated beforehand, or it is applied at a low temperature, it will cause the emulsion paint film to be poor, and the latex This phenomenon will happen soon after the paint. Sometimes too much water when brushing, etc. can also cause the paint to become powdery.
Prevention: First of all, the wall should be completely dealt with, with a special wall putty brushing the wall surface and to be smooth; then first with water or oily back cover primer painted again, and then painted twice the topcoat. In addition, latex paint must be mixed with water in accordance with the prescribed ratio, and avoid construction at low temperatures.
Discoloration and fading
Causes: Some wall temperatures are too high, long hours of sunshine, or water-soluble salts crystallize on the surface of the wall and cause discoloration and discoloration of latex paints; some walls contain too high alkalinity, which affects the weak alkaline resistance The pigments or resins cause discoloration and discoloration; while others are improperly constructed and applied at the same time as the polyurethane paints. The TDI ingredients contained in the paint will discolor the latex paint.
Prevention: As the first situation is relatively rare, you can consult the relevant personnel; for the second case, refer to the treatment of the powder; In order to avoid the third situation, both the latex paint and the polyurethane paint should not be used at the same time. Apply latex paint two days later (at 25 degrees Celsius) or paint thoroughly after the latex paint has dried completely (7 days at 25 degrees Celsius).
Cause: This phenomenon is caused by the moisture inside the wall to make the paint film out of the wall, causing peeling. Of course, improper handling of the wall can also cause such problems.
Prevention: look before construction, if any leakage occurs, please promptly ask the relevant department to resolve it. If it is a new house, the phenomenon of evaporating water from the wall is unavoidable. Special treatment should be added. It is recommended that the walls be pretreated with a durable, waterproof, elastic putty, and then painted as usual. Peeling and shedding problems. In view of the above three conditions, in addition to special reasons, improper handling of the walls will cause problems of latex paint on one side or the other, so when you supervise the construction, you must allow the workers to clean the walls. Behave rashly, otherwise the consequences could be disastrous.
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