Thermal transfer system for fired ceramic decals

摘要

A process for preparing a ceramic decal in which a printed image is applied to a backing sheet, and a covercoating is then applied to the printed substrate. A digitally printed ceramic colorant image is applied to the backing sheet; metal oxide colorant with a refractive index of greater than about 1.6 is used as the colorant. Thereafter, the printed image is covercoated with an overcoat containing frit and binder. The total amount of frit applied in the process divided by the total amount of colorant used is at least 2, and the frit used has a melting temperature of at least 550 degrees Centigrade.