Abstract: The strength of high lead or alkaline earth oxide sealing glass articles is increased by treating the surface of the articles with a solution of dilute nitric acid containing about 1-10 weight percent of concentrated nitric acid in water for the time necessary to remove a thin layer of material from the surface of the article.The purpose of this abstract is to enable the public and the Patent Office to rapidly determine the subject matter of the technical disclosure of the application. This abstract is neither intended to define the invention of the application nor is it intended to be limiting as to the scope thereof.

Abstract: A low temperature glass frit seal composition and process employs a paste including particulate lead glass, an organic vehicle, and small amounts of finely divided TiO.sub.2. The TiO.sub.2 prevents attack by residual organic vehicle on the lead glass during sealing and adjusts the coefficient of thermal expansion to be compatible with the substrate glass.