The main performance of paint paste is determined by the pigment used to produce the paint paste. Water-based paint paste has good compatibility with a variety of coatings, which has been recognized by a large number of users. At the same time, the following two issues must be paid attention to during use:
The influence of acidity and alkalinity of wall substrate on the color retention of color paste
1. The ideal pH value to maintain the stability of water-based paint paste is between 6.5 and 10;
2. Before applying colored latex paint, special attention should be paid to the alkalinity of the wall. If the alkalinity is too strong, the color will fade easily. The obvious phenomenon is that the wall will be alkaline, bitten, and white;
3. If possible, the alkaline strength of the wall to be painted should be tested. If the alkalinity is too strong, the wall should be treated first to make the PH of the construction wall <10 (treatment method: use 5 to 10% oxalic acid Solution cleaning);
4. The construction wall must be clean and dry, free of oil, crusting, and peeling, with a moisture content of less than 10%. The ambient temperature of the construction site must be above 8°C and the relative temperature below 85%. Selection of paint paste formula to ensure color retention of exterior walls.
Instructions on the amount of paint colorant added
1. When designing the coloring formula, try to choose a colorant with good weather resistance and light resistance. Inorganic colorants have good weather resistance and light resistance, and are cheap, but they are not very bright and cannot produce highly saturated colors. Organic pigment pastes, such as phthalocyanine blue paste, phthalocyanine green paste, and red 254 paste, have bright colors and high tinting power. They have high saturation, light resistance, and weather resistance when blending dark or light colors. The properties are also good, but the price is higher than inorganic iron red iron yellow pulp. If the two can be used in combination, it can not only satisfy the hue and saturation, but also ensure the weather resistance of the color, and the price is economical and affordable.
2. The harmful substances in the color paste ingredients sound scary, but during production, the limits of toxic substances in the color paste ingredients will be within the control of national standards. </p
