When the coating film of the topcoat does not need too high gloss, a matting agent can be used to achieve this effect.
Matting agents are used to manufacture surface decorative coatings with different levels of gloss. The gloss is low and the light reflection is less, so as to reduce surface glare and reduce visual confusion. The particles of the matting agent can produce the effect of changing the light reflection, so that only a small amount of light can be reflected normally.
Commonly used matting agents can be divided into two categories: organic and inorganic. Inorganic ones include synthetic silica, kaolin and diatomaceous earth. The organic ones are mainly synthetic waxes and stearic acid metal soaps. Synthetic silica has high purity, high inertness, and can withstand ultraviolet radiation. The performance of silica matting agent is reflected by physical properties such as particle size, porosity and density. Silica with high porosity has a better matting effect, and the average particle size and its particle size distribution play an important role in reducing the gloss of the coating.
