Method of strengthening glass and increasing the scratch resistance of the surface thereof

摘要: A combined treatment for newly formed glass bodies increasing the mechanical strength thereof, and scratch resistance of surface. Newly at elevated temperatures, usually somewhat above 800* F. are sprayed or otherwise coated with stannic chloride, a compound titanium zirconium which pyrolyzes to form metal oxide film on While still temperatures an aqueous solution potassium volatilizes deposits salt acts through previously deposited tin, coating effect exchange larger ions smaller sodium in surface layer produce compressive stress layer. The is held temperature below its strain point, cooled relatively slowly lehr, whereby this ion proceeds sufficient degree while temperature. When has it washed remove excess unexchanged from expose exterior surface, final olefin polymer, such as polyethylene applied bond coact substantially improve Various transparent organic coatings may be employed coating.