1.1 This test method describes a typewriter test that compares the cleanliness properties of carbon papers (one-time or multiple use) and is based on resistance to feed roll marking the smear of carbon images.

1.2 This test method also describes how to compare the cleanliness properties of the backs of carbon papers.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 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.