Recent content by glman

Chemical tempering follows the same concept as thermal tempering in that it puts the surface layer into compression. In chemical tempering this is done through ion exchange. The glass is put into a molten salt bath and the sodium ions are replaced with larger potassium ions forcing the surface...

I am looking for a borosilicate batch formulation with a mid-range thermal expansion (~40-50) that can be melted below 2700 F.

If you anneal the glass to remove the temper you can work the glass. a typical annealing temperature is about 1100 F. bring the glass to that temperature slowly(100 F)/ hour, hold for an hour or so and bring back down at the same rate. Tempered glass can be ground or polished as long as you...

The windshield is untempered sodalime silicate glass slumped to shape with a polymer layer between two sheets to keep it from falling apart. The Side windows are Tempered sodalime silicate which will shatter into small "safe" pieces on impact. The headlights have been going to...

A more likely cause is the difference in thermal expansion between the metal clips and the glass. This could easily be causing your problem.

A tempered glass is one where the surface is put into compression to give it additional strength. From a thermal shock standpoint, tempered glass has much greater thermal shock resistance than untempered. When a tempered glass fails, it is primarily due to a crack that has penetrated the...