Glass ceramic article having a metallic coating layer in a localized area or its surface and method of making the same

摘要: A glass-ceramic article having in a localized area of its surface coating layer copper and/or silver integrally bonded to the body, which metallic does not protrude outwardly beyond adjacent layer. And as one method making such an article, there is provided comprising putting adjacently together molten mass glass-ceramic-forming composition (A) and (B) containing small quantity compound, forming resulting into glass thereafter heating formed reducing atmosphere devitrify while causing formation only exposed (B).