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Pigment paste

According to the object of the color and environmental requirements, the Colorant is divided into two kinds of lightfast and not lightfast. In general,the use of the system does not exist in the case of compatibility, in order to achieve the minimum cost of color,do not require lightfast. And external use must consider the following factors:

A. Lightfastness and weatherability; b. Chemical resistance (mainly acid and alkali resistance); c. Compatibility with the use of the system; d. Color strength, hiding power and color contrast properties; e. compatibility between colorants f. Storage stability of pastes;

In general, topical paint on the color retention of the color is very stringent , so the choice of color paste in particular to pay attention on the weathering resistance and lightfast and acid and alkali resistance. under the conditions of compatibility,tinting strength, hiding power,color contrast properties and good storage stability.it is better to match colors by the property of the monochromatic color paste with good lightfast and weather resistance,but in fact they are tertiary colour.So It is desirable to follow the performance of inorganic and inorganic, organic and organic or lightfast and weather resistance, etc. (1 / 25ST dilution , Light resistance should be 7 ~ 8 or 8, weatherability should be 4 to 5 or 5) as a principle, so that can ensure that the outdoor color retention, in order to avoid the color paste due to significant differences in weather performance, resulting in a long time Causing discoloration or color unevenness and hair and other coating defects.

Fineness is an intuitive indicator for the coloring effect of the colorant and the storage stability. Generally for the same pigment paste, the smaller the particle size, the bigger specific surface area, and the covering power is increasing, the color strength is also stronger; the fineness is smaller, the gloss is more higher, dispersion and storage stability is better. Of course, the fineness of the paste is not as fine as better, because when the particles become smaller, the specific surface area is increased, the absorption of light energy is increased, the degree of damage is also increased, resulting lower weather resistance; and if particle size is too Small when in the coating film drying, with the precipitation of water, the paste together separate out to the surface migration, lead to the matched color not exact and wall color is different.

   Oily paste pigment are resistance transference, high temperature resistance, resistance yellowing, good weatherability, acid and alkali resistance, resistance to sulfide, easy to disperse, no wire, health and not wasted, easy to operate; environmental color paste has tested through environmental testing in Europe and America , no harmful substances; each has more than 30 kinds of basic colors, also according to customer requirements deployment, can provide technical guidance, recommended technical staff.

The color paste is a semi-product made by pigment or pigment and filler dispersed in the paint. Pure oil as the adhesive called oil color paste. A resin paste as the adhesive is called resin paste. water as a medium add surfactant to make pigment paste is called an aqueous paste. As there is many different kinds of paint ,also has many different kinds of color paste. In order to make the pigment better dispersed in the paint,usually in the manufacturing process, add a small amount of surfactants, add zinc naphthenate and so on. The compatibility of the paste with the use-system is the key to the color of the paint, flocculation and some paint film surface defects.before match color with color paste, we must do compatibility experiments, additives can often be used to solve the compatibility of paste and paint problems.


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