Can glass be sprayed to get tempered glass?

Um NO you temper glass the same as you temper any thing else. You have to heat it up. it cant be cut after it has been temoerd either.

Cross section of glass has two areas, compressive strength area and tensile strength area. When glass is heated above 600 degree and fast cooled, the compressive strength area expands. Since glass has more compressive strength than tensile strength, it becomes difficult to break it. Tempered glass, especially toughened glasses are 4 to 5 times stronger than normal glass. These glasses break into small circular fragments. Normal glass breaks into sharp pieces and is a safety hazard. You may also refer this link for mare on tempered glass -Wordpress.com/2011/01/18/glass-tempering-or-toughening-process/">https://theglassblog.Wordpress.com/2011/01/18/glass-tempering-or-toughening-process/