Forehearth colorant

Details Forehearth colorant Forehearth colorant

1992-07-08

1993-10-26

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 4, 501 29, 106600, 106608, 65 33, C03C 608, C03C 1014

Patent

active

052566021

ABSTRACT:
A non-melted, non-powder concentrated colorant material consists essentially of a flux that is not over 30% by weight of an alkali metal borate, a binder that is an alkali metal silicate and 35-60% V.sub.2 O.sub.5. The flux, binder and colorant oxide constitute at least 90% of the composition. A method of producing a black glass-ceramic material comprises forming the colorant material into particles and adding the particles to a precursor glass for the glass-ceramic while the glass is passing through the forehearth of a glass tank in a molten state.

REFERENCES:
patent: 2920971 (1960-01-01), Stookey
patent: 3408212 (1968-10-01), Dumesnil
patent: 3663245 (1972-05-01), Bryson
patent: 3932312 (1976-01-01), Kazmierowicz
patent: 3951667 (1976-04-01), Kogure et al.
patent: 4211820 (1980-07-01), Cantaloupe et al.
patent: 5070045 (1991-12-01), Comte et al.

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