What is meant by full-body coloured porcelain stoneware?

Full-body coloured porcelain stoneware maintains, in the body of the tile, the same material and colour configuration of the surface. The firing process of the product is designed to achieve a vitrification state following which the tile is able to possess a water absorption level lower than 0.5% (frost-proof).
Thanks to their compactness and homogeneous surface, these products can also be used in high traffic areas.