METHOD OF AND APPARATUS FOR BURNING GRADUATIONS SYMBOLS AND LETTERING INTO GLASS ARTICLES

摘要

The invention provides a method of and apparatus for burning graduations, symbols and lettering into glass articles by using a glass substrate and a marking enamel or stain which have different absorptions for light and radiant heat in such a way that firing by radiation heating between 400x10<->9 m. and 2,500x10<->9 m. raises the temperature of the colored areas on the glass above that of the glass substrate itself by about 150 DEG C.