| 摘要 |
Forehearth color concentrates for coloring molten clear base glass in a glass furnace forehearth after melting and fining, comprising a non-smelted interspersion of a flux and colorant. Suitable fluxes are those materials which are compatible with the glass and which promote the fusion and dispersion of the colorant. Suitable fluxes include the alkali borates, boric acid, alkali phosphates, orthophosphoric acid, alkali silicates, fluosilic acid, alkali fluorides, alkali salts, alkali hydroxides, mixtures and reaction products of said fluxes. Alkali silicates and particularly sodium silicates are preferred. Suitable colorants include color indicating metals, color inducing metal oxides or compounds which contain a color inducing metal oxide.
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