Recently, the production of dense/porous bi-layered ceramics through a simple, fast and flexible procedure was reported
[33]. The ceramic tiles were designed to obtain a dense top layer and a porous bottom-layer. The produced ceramics were
lighter than the fully dense product, enabling weight reduction,
thus presenting potential as floor and wall tile materials.
Colombo et al. [34] produced a hybrid glass–ceramic using
double pressing. A glass–ceramic frit was employed as a glaze
forming a dense layer on the surface of a brown-colored body
derived from natural and waste raw materials.