Explain the application of pearl powder in coatings

Explain the application of pearl powder in coatings

Coating: According to the nature, it is divided into solvent-based coating, water-based coating and powder coating.

According to the coated substrate, it is divided into metal paint, plastic paint, wood paint, architectural paint, etc.

Special coatings are divided into UV coatings and fluorocarbon coatings.

Pigment effect: Fine-grain pigments produce a soft, delicate luster, like silk or pearl; coarse-grained pigments produce a shimmering sheen.

Processing suggestions:

1. Pearlescent pigments are highly dispersible in various systems, and since the special sheet-like structure of pearlescent pigments cannot withstand high-strength shearing, pearlescent pigments should be added by low shear mixing at the final stage of coating processing.

2. Because the color and luster of pearlescent pigments are caused by interference of light, the transparency of the coating should be ensured to prevent mixing with highly opaque pigments, otherwise the pearlescent effect will be reduced or completely eliminated.

3. The directional arrangement of the pigments should be considered during construction to achieve the desired gloss effect. In order to obtain a fine and soft luster, it should be arranged in a completely horizontal orientation; if you want to obtain a shimmering luster, the pigment should be arranged in a disorderly manner. The quality of the directional arrangement is related to the coating system and also to the construction method. The effect of the solvent system on the directional arrangement should be considered when processing the coating. The volatilization speed of the solvent will directly affect the directional arrangement of the pigment. It is best to use spraying, the air pressure of the spray, the distance between the spray gun and the substrate, and the spray speed are all factors that affect the directional arrangement.

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