GLASSES MADE OF PINK BOROSILICATES, THEIR MANUFACTURE, AND ARTICLES MADE OF SUCH GLASSES

摘要

This invention is directed to the production ofborosilicate glasses displaying a pink coloration and achromaticity at a thickness of 4 mm with Illuminant Cwithin the ranges of:x = 0.3115-0.4200y = 0.3170-0.3600Y = 15-92%The glasses consist essentially, expressed in terms ofweight percent on the oxide basis, ofSiO2 ~65-85 ~Na2O+K2O~2-8B2O3~~ 20 ~Al2O3 ~~1-6Na2O~~ 0-8 ~MnO2 ~~0.05-1 .R2O~~ 0-8