Improvements in the systems of coating surfaces, perfections in the construction of ovens and method of manufacturing frits. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the coating systems of surfaces, surfaces susceptible to being subjected to heating, such as kitchen ovens, exhaust elements of motors and the like, and, more particularly, improvements in vitreous porcelain enamel systems having a mat surface a semimate capable of oxidizing residues and/or organic compounds that remain and/or come into contact with it when it is heated to a temperature of at least about 350º f (about 175º c), characterized in that said vitreous porcelain enamel is formed from a frit that has at least one oxidation-inducing oxide homogenously fused throughout its mass, chosen from the group consisting of the oxides of co, mh, cu and cr, in an amount, alone or in combination, which totals from about 10 to 70 weight percent of said frit, which frit has been heat treated by exposure thereof at an ambient temperature of about 1000º f (approx., 540º c) to about 250º f (approx., 140º c) above its aluminum scratch point. (Machine-translation by Google Translate, not legally binding)