1.1 These test methods cover the determination of reducible sulfur in paper and paperboard within the context of the given definitions.

1.1.1 Method B - The semiquantitative method indicates the general level of reducible sulfur with limited accuracy.

1.1.2 Method A - The quantitative method gives a measure of the reducible sulfur with much greater accuracy.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.