What common problem does oily coating have

(l) foaming: the primary cause is improper treatment of the bottom layer, and the coating is too thick, especially when the large core plate is the bottom layer. The method that avoid besides oily coating should mix equably before applying, master the consistency of paint liquid outside, can be in besmear before brush build glue on putty layer. When reworking and repairing, clean the bubbling and peeling area, brush the construction glue before repairing.

(2) anti-alkali dropping powder: the primary reason is that the bottom layer is wet without dryness, and the undercoat of sealing primer and oily coating is also an important reason. If anti-alkali drop powder is found, it should be redone and repainted to remove the coated materials until the bottom layer is dry before construction. It is necessary to use sealing primer to brush first in the construction, especially for new walls, the consistency of finishing paint should be appropriate, white wall should be slightly thicker.

(3) droop: the primary reason is that the oil coating has low viscosity and the coating is too thick. In the construction, it is necessary to adjust the consistency of oil paint and not to add too much water. When operating, the setting pen must be frequently dipping, less dipping, diligent, to avoid the occurrence of flow hanging, activities. If the falling fall occurs, the paint film should be polished with fine sandpaper, and the finish should be cleaned and painted again.

(4) permeable bottom: the first is that the oily coating is too thin, infeasible or the material quality is poor when painting. In the construction should be selected products with high solid content and strong covering capacity, if found permeable bottom, should increase the number of paint brush to reach the requirements of the wall paint standard.

(5) non-smooth coating: the primary reason is the impurity of paint liquid, over-thick paint liquid and poor quality of emulsion paint. In the construction should use the brand of good leveling, after all a paint brush, paint liquid should be filtered after use. Paint fluid cannot be too thick, when the coating does not slip, can use fine sandpaper after grinding smooth, brush again face paint.

(6) crack: the construction temperature is too low. Can not reach the film forming temperature of emulsion paint and can not form a continuous film; Improper treatment of the bottom layer: such as wall cracking caused by film cracking; The first coating is too thick and not completely monotonous that is the second coating, because the surface monotonic speed is different, resulting in the cracking of the coating. Cracking of the blown cement putty results in cracking of the coating.

(7) falling: the primary reason is that the construction temperature of the emulsion paint is low, which fails to form a continuous film and cracks, and will fall when it encounters water. Loose bottom, oil and other contaminants, coating film and poor adhesion to the bottom, forming a drop; The strength of the bottom batch scraping putty is low. The substrate is too smooth to form poor adhesion of the coating film. Fall: prevent: investigate first before construction, if have leakage to happen, should ask concerned department to deal with in time, should add special processing, advocate to use durable strong and waterproof bullet to make pretreatment to metope, next again according to convention besmear brush. The wall must be treated clean during construction.

(8) discoloration and discoloration: some walls have high temperature, long sunshine time, or water-soluble salts crystallize on the surface of the wall, forming the discoloration and discoloration of emulsion paint; Some walls contain too much alkali, which damages the pigments or resins that are weak in alkali and makes them discolored and faded. Latex read and polyurethane paint do not use together, can be painted in two days after paint, or until the emulsion paint completely dry after class (25 degrees centigrade needs 7 days) brush oil.