In the coating process of 2C1B metallic glitter color topcoat, the base coat and the finish coat are "wet-on-wet" process, that is, both are dried together (relevant equipment: oven), and the drying speed of the base coat is And the degree has a great influence on the appearance quality of the topcoat film.
The base paint is generally one-component, and the drying (drying) process of the coating film is the volatilization process of the solvent (related instrument: drying time Tester). Fast drying inside (that is, the solvent in the coating film is basically volatilized). If the drying is slow (solvent volatilization is slow), the aluminum powder aligned in parallel may flow, or when the solvent is not volatilized before the varnish, it may be miscible, causing the aluminum powder to float, which directly affects the coating film of the shiny color topcoat. Exterior. The drying speed of the base coat depends on the ambient temperature in the drying room, the wind speed and the solvent vapor concentration, the volatilization speed of the solvent, etc. Please pay special attention: The solvent of the base coat needs to use a low boiling point solvent with a fast evaporation rate. In order to speed up the drying of the base paint, some body painting lines are equipped with a hot air blowing device in the drying section.
Typical today's drying specifications for iridescent basecoats are as follows.
