Tempered Glass

A reliable source for Glass Fabrication information and leading Glass Fabrication Companies.

Although it looks indistinguishable from normal glass, tempered glass is four to five times stronger than standard float glass. Read More…

Tempered Glass Tempered glass, also called toughened glass, is a type of safety glass that is used when human security is a concern.

Leading Manufacturers

New Haven, IN  |  260-749-9614

We make it our goal to offer the top glass cutting services in the industry. Although we started small when we were founded in 1950, we have grown every year and are now one of the largest glass suppliers in the industry. We make products for more than just the optical industry, and can make customized products to suit any need. Contact us for a quote today!

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S & S Optical Company, Inc. $$$

Cambridge, ON  |  800-315-0387

Glass cutting is a varied industry, and we have done it all for the past 50 years. We believe in manufacturing high quality glass products that will exceed customer expectations every time. Our goal and mission has always been to ensure our customers are satisfied and will come to us with all of their glass needs. Contact us to learn more today!

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Pegasus Glass $$$

Painesville Township, OH  |  440-639-6399

Founded in 1990, Technical Glass Products is a fabricator of Fused Quartz Glassware. We maintain a broad inventory of labware, flat stock, rod and tubes in addition to providing custom fabrication using state of the art equipment to suit your needs. Our commitment to excellence has resulted in TGP becoming America’s fastest growing supplier of stock shapes and fabricated products in the industry.

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Technical Glass Products, Inc. $$$

Port Jervis, NY  |  845-856-5375

Gillinder is a high-quality glass manufacturer and glass fabricator. Since 1861, we have been providing our customers superior glass products and glass fabrication services. Heat resistant glass is among our trusted products, which have served the marine, aircraft, industrial and landscaping industries in a variety of applications. We are ISO 9001:2015 certified. Contact Gillinder and let us meet any and all of your glass cutting needs today!

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Gillinder Glass $$$

Chicago, IL  |  773-525-0435

As glass fabricators, Torstenson Glass specializes in flat glass, wire glass, obscure glass, transparent glass, textured glass, heat resistant glass and the FireLite® family of products. We have operated continuously for over 110 years, and we welcome the opportunity to discuss your glass fabricating needs. If we don’t have it, we can generally draw from experience to find you whatever you need.

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Torstenson Glass Company $$$

Vineland, NJ  |  800-982-4734

Glass, Quartz & Vycor® Components fabricated to your specifications. Processing specialties such as Concentric Grinding, Corning Chemical 7931 Grades®, Glass–Quartz Forming, Glass-to-Metal, Glass-to-Glass, Lathe & Hand Tooling, Precision Bore Glass & Quartz Tubing, Quartz-to-Borosilicate Graded Seals, Special End Finishing. ISO 9001:2000 Registration.

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Precision Electronic Glass, Inc. $$$
placeholder image S & S Optical Company, Inc. Pegasus Glass Technical Glass Products, Inc. Gillinder Glass Torstenson Glass Company Precision Electronic Glass, Inc.

Tempered glass is produced by a heat treatment process that balances the center and outer stresses of the glass and changes the internal structure of the particles. If tempered glass is broken, it will instantly shatter into small, relatively harmless thumbnail sized pebbles, instead of sharp, jagged shards, which could seriously injure a person. Tempered glass is widely used within the construction, automotive, electronic and kitchen appliance industries.

Storm doors, window panes, glass in building entrances, shower doors, sliding doors, coffee maker carafes, oven windows, tableware, computer screens, cell phone screens, diving masks and microwave oven screens are all made of tempered glass, as they are often used and surrounded by human activity. Building codes often require public buildings to use tempered glass in construction of their windows or decorative features.

Tempered glass breaks at about 24 thousand psi, but shattering will still occur at that point. One downside of tempered glass is the tendency to shatter without warning if a small knick occurs. Instead of partially breaking or becoming shards that stay in place, tempered glass explodes into thousands of small pieces instantly, even if a small section of the glass pane breaks.

Many glass fabricators temper glass through a process involving extreme heating and rapid cooling. First, a pane of standard glass is cut, washed, sanded and inspected, because after glass has been tempered, any altering to its shape will result in shattering. Then the glass is heated to 620º C in a tempering oven for a short time. When it exits the oven, the glass is promptly quenched with high pressure blasts of cold air.

This cooling process reduces the temperature of the glass' exterior, while the center remains heated. Therefore, the center remains in tension while the outer goes into compression, thus balancing out the glass tension and significantly increasing the force required to shatter the glass. Although tempered glass is much stronger than normal glass, it is used only for the rear and side windows in cars.

The front windshield is typically made of laminated glass and composed of 2 outer layers of glass and an inner layer of transparent vinyl. If broken, the glass will cling to the vinyl instead of falling onto passengers. Coatings and laminates are sometimes applied to prevent scratching.

Tempered Glass Informational Video