Is the fineness of the color paste the finer the better?

Whether the fineness of the color paste is as fine as possible depends on two aspects. On the one hand, it is analyzed from the system and characteristics of the color paste; on the other hand, it is analyzed from the use of the color paste.

1. The influence of color paste fineness on color paste system and characteristics. Fineness is an intuitive indicator that reflects the dispersion effect and storage stability of color paste. Generally, for the same pigment paste, the smaller the particle size, the greater the specific surface area, and the higher the tinting power; the smaller the fineness, the higher the gloss, and the better the dispersion effect and storage stability. However, when the fineness of the color paste is too small and its specific surface area increases, the absorbed light energy increases and the degree of damage also increases, resulting in a decrease in its weather resistance; and when the particle size is too small, when the paint film forms and dries, the With the precipitation of stained water, the color paste migrates to the surface together, which can easily lead to inaccurate color matching and color difference on the decorative surface.

2. The influence of color paste fineness on the use of color paste. The fineness of the color paste will directly affect its hiding properties. The fineness of the color paste generally used in latex paint is generally 1 to 3 microns. However, when used in decorative paints such as wood paint, the transparency of the color paste is relatively high, so its fineness is relatively fine. <br /