This combination will contribute to both a thin film print for optimum drying and also maximum usage of the ink. Squeegee pressure should be normal and the squeegee itself should be sharp when printing broad areas to help compensate for the fluted surface of the Coroplast. When printing film halftones or transparencies, the squeegee should be medium to sharp. Use only the recommended solvents for the inks you are printing. The use of other solvents not compatible with the ink formula can create printing and adhesion difficulties.
Many solvents are hygroscope - they pick up moisture.
Coroplast is a rigid sheet and can best be printed on flat bed types or semi-automaticor automatic presses. Higher temperatures will tend to warp or distort the Coroplast sheet. Inks should be printed at a viscosity slightly higher than would normally be used for printing paper stocks. If the ink is too thin it will tend to spread in the flutes and will affect the normal sharp printing qualities of the ink. The use of compatible halftone base is suggested when printing fine halftones or transparencies.