Patent ID: 6984597

Claim:
A forehearth color concentrate comprising a non-smelted agglomerated interspersion of particles for use in coloring glass, said concentrate comprising by weight from about 50% to about 95% of a glass component and from about 4% to about 50% of a binder, wherein the glass component comprises one or more glass frits comprising by weight from about 8% to about 22% Na 2 O, from about 15% to about 60% SiO 2 , from about 0% to about 25% B 2 O 3 , from about 0% to about 25% K 2 O, from about 0% to about 3% Li 2 O, from about 0% to about 2% Al 2 O 3 , from about 0% to about 15% CaO, from about 0% to about 5% TiO 2 , from about 0% to about 1% F 2 and from about 15% to about 35% chromium oxide.