This part of ISO 10545 specifies a method for determining the frost resistance of all ceramic tiles intended for use in freezing conditions in the presence of water.
ISO 10545-12:1995 history
1997ISO 10545-12:1995/cor 1:1997 Ceramic tiles - Part 12: Determination of frost resistance; Technical Corrigendum 1
1995ISO 10545-12:1995 Ceramic tiles - Part 12: Determination of frost resistance