Treating polychromatic glass in reducing atmospheres

Details Treating polychromatic glass in reducing atmospheres Treating polychromatic glass in reducing atmospheres

1977-06-22

1978-10-03

Bashore, S. Leon

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 32, 65 33, 65DIG2, 106 52, 106DIG6, C03C 1500, C03B 3200, C03C 304

Patent

active

041182146

ABSTRACT:
The present invention primarily comprises an improvement upon the method for producing photosensitive colored glasses or polychromatic glasses utilizing two sequences of exposure to high energy or actinic radiation followed by heat treatment. The invention contemplates replacing the second exposure/heat treatment step with a heat treatment conducted in a reducing atmosphere at a temperature of at least 350.degree. C., but below the strain point of the glass. The resultant articles can be particularly useful in ophthalmic applications.

REFERENCES:
patent: 2649387 (1953-08-01), Parson et al.
patent: 3663193 (1972-05-01), Wilson
patent: 3892582 (1975-07-01), Simms
patent: 3892904 (1975-07-01), Tanaka
patent: 3920463 (1973-11-01), Simms
patent: 3967040 (1976-06-01), Plumat et al.
patent: 4030903 (1977-06-01), Rittler

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