Ceramic Instruments s.r.l. products

This system makes it possible to observe abraded test specimens in controlled and repeatable light conditions. Light intensity can be adjusted. The instrument is already supplied with the light intensity adjusted according to the standard. The test involves the observation of an abraded test specimen which is placed in the middle of a special surface, together with other 8 unabraded test specimens of the same size. The observation is carried out standing in front of the equipment,with visual angle and distance as requested by the standard.

Crazing means hair cracks on the glazed surface of the tile. Resistance to the formation of crazing is determined by subjecting the whole tiles to high pressure steam in an autoclave and then checking the tiles for the presence of crazing after applying a colouring substance to the glazed surface. For large sized tiles the standard envisages cutting. The cut pieces must be as large as possible and each part must be checked. UNI EN ISO 10545-11 Standard.