A transparent glass manufactured by drawing. Sheet glass has natural fire finished surfaces, but because the two surfaces are never perfectly flat and parallel there is always distortion of vision and reflection.
A transparent, flat glass whose surface has a characteristic waviness. There are three basic classifications of sheet glass: Single Strength, 3/32" thick. Double Strength, 1/8" thick. Heavy sheet which has three available thicknesses: 3/16", 7/32" and 1/4".