A colored glass frit with a specific surface area of less than 2 square meters per gram that contains from about 1 to about 80 weight percent of metallic element material and from about 30 to about 80 mole percent of glassy network forming oxide material. The frit has a transmission density per micron...http://www.google.com.au/patents/US20080090034?utm_source=gb-gplus-sharePatent US20080090034 - Colored glass frit
