Why is the double layer used?

All machines accept the inclusion of the hostname Double Layer ¨ to be able to make parts with two types of aggregates.
The thicker dry underneath and above the finest in the view. In this way we lower material costs because we do not have to color the entire piece.

The production of the machine with double layer decreases by 25% because we have to perform the movement filling twice, (2 mixes) but we managed to reduce costs and that the mass of filler (first) is much larger in size, the front face.