What are the factors that affect solvent volatilization?

(1) Proportion of mixed solvents: The volatilization speed of mixed solvents is mutually restricted by solvent molecules, and its volatilization speed is not the average of their volatilization speeds. (2) Influence of resin: The solvent in ink is complicated to volatilize. When the resin is dissolved in the solvent, the molecules of these two substances are closely combined with each other. At this time, the volatilization speed of the solvent is lower than that of the solvent itself. Liquid ink with a certain viscosity volatilizes when it is dried, and the resin content is increasing, so the volatilization speed of the solvent is also slow. (3) The situation of pigment particles: When pigments, fillers and other substances are added in ink making, the volatilization speed of the solvent is greatly reduced. The finer the pigment particles, the larger the surface area and the slower the solvent volatilization. (4) Influence of environmental temperature and humidity: The higher the room temperature in the printing workshop, the faster the solvent volatilizes; otherwise, it is slow, the indoor air circulates and the solvent volatilizes quickly. If the room is relatively closed, the solvent will evaporate slowly. Therefore, high-speed gravure or flexographic printing machines are equipped with heating and exhaust devices. Conditional plastic printing plants should be equipped with solvent recovery devices, which not only solve the problem of drying solvent volatile ink layer, but also solve the problem of pollution discharge, which is beneficial to the physical and mental health of workers.