coated glass was divided online coated and offline coated.

Online coating is the coating process in the float glass manufacturing process, thermal
spray such as online Float Glass Production Line is the molding area, lehr
start, the spray gun attached by the glass surface coating film, after film after
annealing kiln burning attached to the glass surface, it had really-line coating.
Off-line coating in flat glass factory and then coating process. Compared
with online coating, the coating firmly bound by some degree, So offline coating
on glass slices of "freshness" is a certain requirements.