scope:

1. Scope *

1.1 This practice covers specific procedures and test conditions that are applicable for exposure of plastics in filtered open-flame carbon-arc devices conducted in accordance with Practices G 151 and G 152. This practice also covers the preparation of test specimens, the test condition suited for plastics, and the evaluation of test results.

NOTE 1--Previous versions of this practice allowed use of both filtered open-flame and enclosed carbon-arc devices, and referenced carbon-arc devices in Practice G 23, which described very specific equipment designs. Practice G 23 is being replaced by Practice G 151, which describes performance criteria for all exposure devices that use laboratory light sources, and by Practice G 152, which gives requirements for exposing nonmetallic materials in filtered open-flame carbon-arc devices. Practice G 23 will be balloted for withdrawal before December 2000.

1.2 This practice does not cover enclosed carbon-arc exposures of plastics, which had been allowed in Practice D 1499. Enclosed carbon-arc exposures of nonmetallic materials are described in Practice G 153. Practice D 5031 describes enclosed carbon-arc exposures of paints and related coatings.

NOTE 2--Subcommittee D20.50 is developing a new standard describing exposures of plastics in enclosed carbon-arc devices, and which will reference Practice G 153.

1.3 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.

NOTE 3--This practice is technically equivalent to ISO 4892-4.