Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Patent
1995-03-13
1998-03-10
Nold, Charles
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
428 346, 501 18, 501 21, 501 26, 4273762, 4274194, C03C 3066
Patent
active
057259194
ABSTRACT:
This invention relates to a lead-free glass enamel for glass beverage containers and a method of decorating glass beverage containers using such glass enamel. The method includes the steps of:
i) providing a glass beverage container;
ii) providing a decorative lead-free glass enamel comprising a glass frit, the glass frit comprising in weight percent from 17% to 28% SiO.sub.2, from 12% to 30% B.sub.2 O.sub.3, up to 3% Al.sub.2 O.sub.3, up to 13% Na.sub.2 O, up to 13% K.sub.2 O, up to 14% TiO.sub.2, from 5% to 30% ZnO, up to 14% ZrO.sub.2, up to 6% CeO, up to 6% Y.sub.2 O.sub.3, from 1% to 8% La.sub.2 O.sub.3, up to 1% MgO, up to 5% CaO, up to 10% SrO, up to 16% BaO, from 0.5% to 5% fluoride, a maximum of 5% each of WO.sub.3, P.sub.2 O.sub.5, Bi.sub.2 O.sub.3, Sb.sub.2 O.sub.3 and MoO.sub.3, with the provisions that the sum of the levels of plus Na.sub.2 O plus K.sub.2 O is in the range of 6% to 13%, that the sum of the levels of MgO plus CaO plus SrO plus BaO is in the range of 1% to 16%, and that the sum of the levels of ZrO.sub.2 plus TiO.sub.2 plus La.sub.2 O.sub.3 plus CeO.sub.2 plus Y.sub.2 O.sub.3 is in the range of 7% to 25%;
iii) applying the glass enamel to at least a portion of the surface of the glass beverage container; and
iv) firing the glass beverage container at a temperature of from about 560.degree. C. to about 640.degree. C. so as to produce a resilient decorative coating on the surface of the beverage container.
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Maloney John J.
Muralidhar Sivasubraman K.
Roberts Gordon J.
Ferro Corporation
Nold Charles
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