12mm Ford blue toughened glass is made by heating ford blue float glass to approximately 700 Celsius then cooling the outer surfaces rapidly. This process makes the glass very strong and shock resistant thus more durable. Curved Glass uses this toughening technique though two different horizontal tempering furnaces. Producing tight radius and tangent radius curved glass panels, up to larger size architectural panels in a full range of glass types. Type of curved glass 1. According to the requirements of the building, curved glass is used in three different forms. Bent annealed glass is often used for display applications where the necessity of safety glass is minimal. In display windows and showcases, this curved glass is commonly used. 2. Curved toughened glass is strong and impact resistant because annealed glass is heated to 700 ° C and cooled rapidly to induce glass strength. This type of glass is used in staircases, cabins and other interiors. 3.  Curved toughened glass is strong and impact resistant because annealed glass is heated to 700 C and cooled rapidly to induce glass strength. This type of glass is used in staircases, cabins and other interiors. Curved laminated glass is the toughest glass because the two glass layers are permanently bonded to form it. Even when the glass shatters, it stays within the lamination and doesnot break into pieces.