5.1 This test method measures the amount of inorganic material in the sample.

1.1 These test methods cover procedures used in determining the ash content of adhesives. This standard is intended as a replacement for Method 4032.1 of Federal Test Method Standard 175B, “Adhesives: Methods of Testing.”

1.2 Two test methods are used:

1.2.1 Test Method A is used for a starch adhesive or other type glue, where there is no danger from the non-volatile content forming a rubbery mass when ignited.

1.2.2 Test Method B employs nitric acid to avoid the non-volatile residue being transformed into a viscous foam when ignited.

1.3 These methods are not applicable to adhesives containing decomposable salts such as zinc chloride.

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see 9.2.3.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.