... resistant Chemical Compositions and Physical and Chemical Properties of Borosilicate Glass Type 3.3compositionSiO2B2O3R2OAl2O3Fe2O3 weight%80.313. ... melting, polishing, end-closing, frosting, color-printing and etc.. We are the member of China International Trade Promotion ... cold processing, which includes firing, cutting, melting, end-closing, frosting, color-printing, pattern and logo-printing and ...