What are the requirements for the whiteness of calcined kaolin in the coating formula?
The finer the fineness of kaolin, the smaller the particle size, the greater the oil absorption, the more likely to lose the brightness of the coating.
In the application of coating, whiteness is the first index of calcined kaolin, the higher the better. Whiteness should be greater than 90%, and some manufacturers will require more than 93%. Whiteness stability is very important, and if the volatility of the assembly affects the optical properties of the coating, resulting in the same formulation of different batches of products appear chromatic aberration.
The role of calcined kaolin is filler, not the color of paint, hiding force plays an obvious role, but only increase the solid componentIncrease weight.
Whiteness stability is very important, if the Baidu volatility assembly affects the optical properties of the coating, resulting in the same batch of products obvious color difference.
Paint calcined kaolin, whiteness is higher, at least greater than 90%, and some manufacturers will require more than 93%.
