Low E glass Low E glass, Low E Insulated Glass, Low E Insulating Glass What is it? Online hard coated LOW-E coated glass is produced by pyrolyzing coating material continuously under high temperature through CVD and MOCVD coating technology so as to deposit them on glass substrate surface moving inside a tin bath and black-out furnace. Most of Hard coated Low-E glass is clear or a bit blue grey in China. We also can provide Golden/ Blue/ Purple/ Pink/ Neutral/ Gray Color Reflective Glass.