The 1" x 3" window is available on the smaller kilns such as the E-9A and Q-11A. Watch the bright red kiln interior through the optional 1” x 3” high-temperature glass window. (Note: always wear firing safety glasses when viewing the kiln interior.) The glass window is guaranteed up to 2300°F.
The window is especially useful for glass fusing and copper enameling. Conveniently watch your glass treasures progress through every stage from tack fuse to full fuse.
Enamelists have said, "I can't live without the window!" As you look through the window, angle your line of sight so that the glow from an element reflects off the surface of the enameling piece.
First, the enamel will appear granulated. As the glass particles begin to fuse, the surface will resemble an orange peel. Remove the rack when the copper piece appears a rosy red and the reflection of the glowing element is smooth.