Standard Test Method for
Soluble Sulfate in Ceramic Whiteware Clays (Photometric Method)1
This standard is issued under the fixed designation C 867; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
click below Astm C 867 – 94 (Reapproved 2000) pdf free download