Safety Glazing is primarily achieved via two different manufacturing processes. Worthington & Graham are experienced toughened glass suppliers with a range of experience in supplying dependable glass for safety critical applications.
There are two methods of producing “safe” toughened glass panes. You can find examples of both types within any typical motor vehicle. Traditionally, your windscreen is a laminated glass pane and the sides and rear glass areas are examples of tempered glass.
1) Pilkington Laminated Float Glass is a glass sandwich. Two sheets of ordinary glass sit either side of a vinyl interlayer and are formed within an autoclave which compresses the three surfaces together and expels all of the air, creating a toughened safety glass pane which will hold together even when shattered. The vinyl interlayer keeps the glass bound together even when broken, leading to mere “spider web” cracks on impact.
Clear laminated glass is immediately available from stock in either 4.4mm or 6.4mm thicknesses and can be cut to your requirements, whether rectangles or of a shaped nature. Pilkington Laminated Printed Glass panes are also available in a 7.5mm thickness from stock where immediate availability is a consideration. Thicker clear laminated glass is available to order is normally available within 24 hours owing to a consideration of weight and sheet sizes. Clear laminated glass also has reduced UV transmission properties to reduce the progressive level of fading to furniture and carpet.
2) Tempered glass is four to five times harder to break than ordinary annealed or printed glasses, and if breakage occurs, it does so safely, by disintegrating into thousands of very small pieces with dulled edges. This form of toughened glass is achieved through thermal and chemical treatments. This is the type of glass that is generally used in most glazed areas where weight and a variety of other considerations, such as printed glasses, are required.
Tempered safety glass for glazing purposes is normally available within 72 hours. Toughened glass cut to size cannot be altered once the process has been completed. It is therefore impossible to be reduced in size after manufacturing, so an accurate survey is required before such glass can be supplied.