According to international norms EN176 e ISO13006, a fully vitrified tile is a ceramic tile whose maximum water absorption is 0.5%, therefore belongs to group BIa ( E„T0.5%), classified within the group BI of these norms (E<3%)
The term Gres porcelain is the most extensively used one for this ceramic product, that is highly compacted and has very low water absorption. These characteristics of gres porcelain, together with high mechanical resistance, frost resistance and high abrasion resistance, compares favourably to natural stone.
White biscuit does not reach such low values for water absorption; it is therefore not advisable for use as floor tiles in general.
It is used for wall tiles. The composition refers to a white colour biscuit on which glaze is applied giving a superior quality finish in terms of smoothness, texture, colour transmission on the surface and elegance; all these characteristics are well appreciated by the best decorators and interior designers.
Rectified tiles can be fitted without a visible grout space because porcelain does not contract or expand. We strongly recommend however to fit the tiles with spacer lugs because the surface on which they are fitted can contract or expand or can also not be perfectly level which can create different height levels between tiles.
We recommend a minimum space of 1.5 mm. between each piece.
One should use a specialised flexible adhesive because the absorption of the porcelain is almost nil. One should never use sand and cement mix or similar.
Once it is polished a protection layer is applied to seal the micro porous surface in order to protect it during the fitting.
Once fitted the protective layer should be eliminated using an industrial varnish remover or similar product that can easily be found in the market place.
After that the product can be cleaned wiping it with a dry or humid cloth or using traditional glass cleaning products.
Only diluted with a solution of hipoclorite sodic of a basic PH that does not affect these kinds of materials.
The low water absorption of these materials makes them very rigid and very resistant.
Therefore one should use an electric cutter with a diamond disk for gres porcelain, cooled by water, or a manual cutter with an adequate scoring wheel of 8 mm for smaller thinner pieces, and one of 18 or 22 mm. for bigger and thicker sizes.
La poca absorción de agua que tienen estos materiales, hace que sean poco flexibles y muy resistentes.
Por ello, se puede utilizar un cortador eléctrico con disco de diamante para gres porcelánico, refrigerado por agua, ó un cortador manual equipado con un rodel adecuado de 8 mm. para piezas de formato pequeño y poco espesor, y de 18 ó 22 mm. para formatos y espesores más grandes.