Tempered glass is produced by heating annealed glass in a furnace to 620°C. Progressing from the furnace, the glass is rapidly ... thermal breakage than annealed or heat strengthened glass If breakage occurs the glass breaks up into small, cubical fragments, ... , shops etc. Interior glass screens, partitions, balustrades etc. Shop display windows, showcases, display shelves etc. Furniture, table-tops etc. ...