How to produce clay roof tiles (Part two)
How to produce clay roof tiles (Part two)
4. Drying
The drying process prepares the brick for firing by removing the moisture from the soft “green” brick.
New and more efficient drying and air stream technologies have reduced the drying period to one-third
of the originally required time. This lowers energy requirements, improves product quality and helps us
develop new products.
5. Colouring
After the drying process the clay roof tile, except it remains natural red, is either engobed or glazed.
Engobed clay roofing tiles have matt, matt-glossy or glossy surfaces. Engobes are applied as clay-containing
slips by dipping, pouring over, centrifugal casting or spraying on the still unfired clay tile.Glazed tiles
are covered with a very hard continuous glass layer that closed all pores and makes the tile extremely
water-resistant. at the same time this glass layer gives the tile its special shiny look.