scope:

This Standard specifies the measurement method using water contact angle among the test methods for self-cleaning performance of photocatalytic materials, in which metal oxide semiconductors such as titanium dioxide are mainly used as photocatalysts.

This Standard does not apply to the permeable photocatalytic materials which absorbs water and cannot retain water droplets, photocatalytic materials with uneven surfaces which hide waterdrops, photocatalytic materials with high water repellency, powdered and granular photocatalytic materials, and photocatalytic materials of visible light response type.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 27448 : 2009 Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for self-cleaning performance of semiconducting photocatalytic materials - Measurement of water contact angle (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.