This standard is a procedure for assessing the cleanliness of plumage by the oxygen number, which reflects the oxidizable matter content.

This procedure covers only the cleanliness of plumage as determined by oxygen number and does not relate to any other aspect of its cleanliness, such as non-oxidizable material.

The testing and evaluation of a product against this standard may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this standard has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any existing applicable regulatory requirements prior to its use.