How to choose a good color paste?

Color paste is a semi-finished product made of pigment or pigment and filler dispersed in paint. The oily color paste with pure oil as the adhesive is called oily color paste. Resin color paste is called resin color paste with resin paint as adhesive. The pigment paste dispersed by adding surfactants in water as the medium is called water-based color paste. Because there are many types of paints, there are also many types of colorants. In order to better disperse pigments in the paint, a small amount of surfactant, zinc naphthenate, etc. is often added during the manufacturing process.
Color paste, organic color paste, inorganic color paste, oily color paste, water-based color paste, so how to choose a good color paste?
    According to the coloring object and environmental requirements, the color paste is mainly divided into two types: light fast and non light fast. Generally, when there is no compatibility in the system for internal use, it is based on the principle of achieving color requirements and low cost, and light fastness is not required. For external use, the following factors must be considered:
    a. Light and weather resistance;
    b. Resistance to chemical media (mainly acid and alkali resistance);
    c. Compatibility with the use system;
    d. Tinting strength, hiding power and color development;
    e. Matching between color paste and color paste
    f. Storage stability of color paste;

    In general, exterior paints have strict requirements on the color retention of the color, so when selecting the color paste, special attention should be paid to the light resistance, weather resistance and acid and alkali resistance of the color paste. Under the premise of good compatibility, tinting strength, hiding power, color development and storage stability, the mutual matching of colorants is also crucial. Single-color colorants with superior light and weather resistance should be selected as much as possible, but in fact they are often composite colors, so follow the principles of inorganic and inorganic, organic and organic or light and weather resistance (1/25ST diluted, light fast The principle of durability should be 7~8 or 8, and weather resistance should be 4~5 or 5), so as to ensure the outdoor color retention and avoid the obvious difference in the weather resistance of the coloring paste, which will cause fading after a long time Coating defects such as uneven color and blooming.