This test method will find use by parties concerned about the relative optical stability of various printing and writing papers.

The test will provide manufacturers, paper users and other interested parties with quantified rankings of paper stability that identify papers that are stable, moderately stable and unstable when exposed to light over periods of time.

The stability rankings may be used for definition of the relative stability of papers to light exposure, but will not define specific periods of life expectancy of a given paper.

1.1 This test method describes a laboratory procedure for the exposure of printing and writing paper to xenon-arc light at elevated levels of light flux to permit accelerated aging of that type of paper.

1.2 This test method specifies the sample preparation and conditions of exposure required to obtain information on the relative stability of paper with regard to change in optical properties brought about by exposure of such paper to light.

1.3 This test method provides qualitative results regarding paper stability and does not define the life expectancy for a given paper to reach a specified set of optical properties.

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.