Grill glass and oven glass used in gas stoves and induction heaters, which are commonly found in many households, require heat resistance as the interior of the grill can reach temperatures close to 250 degrees Celsius.

To withstand such usage conditions, the glass undergoes a strengthening process that adds heat resistance. The process of heating and quickly cooling glass to form a stress layer on the surface strengthens it similarly to tempering iron. By using air cooling to strengthen the glass, it can withstand sudden temperature drops of 250 degrees Celsius by applying cold water without breaking. It is also possible to enhance the design by adding shallow curves or decorations to the glass.

MARUJOU supplies grill and oven glass to major domestic cooking appliance manufacturers and boasts a very high market share. By changing the decoration and size, the glass can also be supplied for use in oven toasters and microwaves.