Borosilicate, opal glass article

Details Borosilicate, opal glass article Borosilicate, opal glass article

1979-12-13

1982-06-29

Lesmes, George F.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

Surface modified glass

106 52, 106 54, 106 48, 428426, 428427, 501 63, 501 66, 501 70, 501 71, B32B 1706

Patent

active

043372953

ABSTRACT:
There is disclosed a borosilicate, opal glass article composed of a phase-separated, opacified interior portion completely encased within, and integral with, a transparent, single-phase glass, surface skin. The phase-separated portion contains borate-rich and silicate-rich phases so different in refractive index that light is scattered, and the glass may contain a titania-coupled colorant. The article may be produced by molding a glass charge while simultaneously extracting heat from a surface layer on the molded article to maintain such surface layer as a single-phase glass.

REFERENCES:
patent: 2106744 (1938-02-01), Hood et al.
patent: 2683666 (1954-07-01), Duncan et al.
patent: 2684911 (1954-07-01), Stookey
patent: 2691855 (1954-10-01), Armistead
patent: 2965503 (1960-12-01), Hagedorn et al.
patent: 3413133 (1968-11-01), Stalego
patent: 3493355 (1970-02-01), Wu
patent: 3645711 (1972-02-01), Pirooz
patent: 3709705 (1973-01-01), Hagedorn
patent: 3741861 (1971-04-01), Andrieu
patent: 4130680 (1978-12-01), Ference et al.
patent: 4187094 (1980-02-01), Lu

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