Paint is made by mixing a set of raw materials in specified proportions depending on the desired properties of the product. Modern paint production is highly automated and computer-controlled.
In the first step of the production process, raw materials are automatically weighed on scales and added into a dissolver. In the dissolver, pigments are dispersed in a mixture of binders and solvents or water and ground to a specific degree of fineness in order to achieve the desired gloss. To achieve a higher gloss grade in paint, a bead mill may be used to grind the pigments or the duration of grinding may be extended. The grinding process results in the so-called mill base that is finalized into a finished paint in a let-down tank equipped with a mixer. At this stage, the remaining binders, solvents and additives are added.
After mixing, a product sample of the paint is taken for quality control. In quality control, the fineness, viscosity, gloss, and the coverage of the product are determined to ensure that the paint meets the quality requirements. After the laboratory has approved the paint batch, the paint is filtered and dispensed into cans. In the filtering process, the paint passes through the filter to remove poorly ground pigment particles or any impurities transferred from the tank.