Corning Glass Works

Sylvester R Sandor

Louis M Holleran

Dale R Wexell

William H Dumbaugh, Jr

James E Flannery

David C Boyd

Joseph N Panzarino

Francis A Cantaloupe

Ceramic articles are provided with cadmium red-based decorations of improved chemical durability, by firing the decorations onto the articles at high temperatures. The cadium red-based enamels used for decoration are protected against color burn-out during high-temperature firing by a color stabilizing agent consisting of a fritted, sinterable, devitrification resistant alkali borosilicate glass which is combined with the enamels prior to firing.

Durable ceramic decorating enamels based on thermally stable cadmium red

Ceramic decalcomania for the production of overglaze decorations on ceramic ware which include, in addition to the design layer, two separate layers of powdered glass acting in combination during firing to seal off corrosive glass-pigment interactions and provide fired decorations of improved detergent durability are described.

Ceramic decalcomania

This invention relates to the production of a composite article consisting of an opal glass body exhibiting a dense, milky-white appearance coated with an adherent enamel demonstrating high gloss and exceptional chemical durability. More specifically, the opal glasses of the present invention have compositions within the Na.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 -F system and demonstrate a softening point in excess of 760.degree. C., a strain point in excess of 490.degree. C., and a coefficient of thermal expansion (0.degree.-300.degree. C.) of about 66-75 .times. 10.sup..sup.-7 /.degree. C. The enamels of the instant invention have flux compositions within the Li.sub.2 O-B.sub.2 O.sub.3 -TiO.sub.2 -ZrO.sub.2 -PbO-SiO.sub.2 system, will fire to a high gloss in less than about 10 minutes at temperatures below about 720.degree. C., will exhibit coefficients of thermal expansion (25.degree.-300.degree. C.) about 3-10 points lower than the opal glass substrate, will demonstrate lead release after chemical attack of less than about 2 .mu.g/cm.sup.2, and will manifest excellent resistance to dishwasher detergents.

Composite glass articles spontaneous opal glass and enamel of Li.sub.2

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Corning, NY, United States of America

Sylvester R Sandor