Additives or fillers are added to the paint in very small quantities for a specific purpose and have no effect on the nature of the paint and have only economic justification. That is, it is only used to reduce the price of paint, which can be called calcium carbonate, zinc oxide and talc as additives. If the additives are used correctly in the color formulation, the color formulator can produce the highest quality color without any increase in price or even by reducing it, without reducing the quality.
Additives are usually grouped into two types, depending on the type of application or function of the additive, which is usually grouped by additive manufacturers. To apply and then included in the film dry or hardened.
Of course, it should be noted that there are cases of colors that do not have all the items mentioned above in their color formulation. For example, powder paints that do not use solvents in their formulation or varnishes that do not use pigment in the formulation of varnish.
A general view for color production is the use of 30% resin (helping to adhere), 40% titanium (white pigment and very important in color production), 20% solvent and about 10% additive, but these values can be different. Therefore, for the production of paint, the above materials are mixed together by a device called a mixer, and the mixing operation is performed continuously for two hours.
The source of this article is the Persian section of the site, which you can read if you are fluent in Persian: افزودنی ها