Method of making colored photochromic glasses
US4832724A · kind A · utility
11Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Feb 26, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for modifying surface coloration in silver halide-containing photochromic glasses developed by thermal reduction treatments is described, which method comprises subjecting the glass, prior to the coloring thermal reduction treatment, to a silver ion exchange treatment during which silver ions are introduced into at least a portion of the surface of the glass article. Subsequent thermal reduction of the silver-containing surface portion of the glass provides novel colors and/or color patterns therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.