AUTOCLAVESTANDARDIZED FOR TESTING CRACKING RESISTANCE OF GLAZED CERAMIC TILES.UNI EN ISO 10545-11 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.