SILVER GLASS PASTE SUITABLE FOR RESISTANCE STRIPS FORMATION BY SILK-SCREEN PRINTING TECHNIQUE

摘要

Application of resistance strips on glass is usually carried out by a silk-screen printing technique using pastes containing silver and zinc with subsequent firing. Layers formed by pastes containing zinc need to be subsequently plated with silver. Existing methods are labour intensive and the formed layers are not very resistant to abrasion. The silver paste according to this invention eliminates these disadvantages. By mass it contains 50 to 75 parts powdered silver with maximum particle size of 8 micrometers, 0.04 to 0.2 parts rhodium mercaptide, 3.5 to 6 parts fluxing agent composed of 85.2 % by weight lead oxide, 5.2 % by weight silicon oxide and 9.6 % by weight boric oxide and with a maximum particle size of 4 micrometers, 0.4 to 0.75 parts rheological additive on a base of hydrogenated castor oil, 1.0 to 3.9 parts ethyl cellulose, 8.6 to 10.2 parts terpineol and 9.3 to 31.5 parts butyl diglycol.