AATCC 24-2004 Insects, Resistance of Textiles to Developed in 1940 by AATCC Committee RA49; Jurisdiction transferred in 1994 to AATCC Committee RA31; revised 1949, 1952, 1963; reaffirmed 1956, 1971, 1974, 1977, 1980, 1989, 1999; editorially revised 1974, 1976, 1988, 1992; editorially revised and reaffirmed 1985, 1994, 2004. Related to ISO 3998.
5. Apparatus and Materials
5.1 Test Cages.
5.1.1 The cage for conducting the tests may be any shallow glass or metal flat- bottomed container large enough to per- mit the test insects to be either in contact with or off the horizontally placed test specimen. It must be well ventilated and provided with a 60mesh metal screen cover.
5.2 Test Insects.
5.2.1 Black Carpet Beetle (Attagenus megotoma (F.)—Larvae are used from cultures maintained as described in Appendix A. Larvae must be in the weight range of 6-7 mg each and of such size that they pass through a U.S. Standard Sieve Series No. 14 sieve and are re- tained on a No. 16 sieve as described in Appendix A, A10 and A11.
5.2.2 Furniture Carpet Beetle (Anthre- nus flavipes LeConte)—Larvae from cultures maintained as described in Appendix C may be used as alternative test insects with the black carpet beetle. Larvae must be approximately nine weeks old when put on test as measured from the time of egg deposition. The feeding propensities of the two species are similar.
5.2.3 Webbing Clothes Moth [Tineola bisselliella (Hum.)]—Larvae are used from cultures maintained as described in Appendix B. Larvae must be 25-27 days old as measured from the date of egg dep- osition to the time they are put on test since older larvae may pupate during the test period.
5.2.4 Other Species—Other species of insect pests may be used for obtaining supplementary data insofar as the test methods herein described are applicable.
5.3 AATCC Moth Test Cloth—(see 15.2).
6. Test Specimens
6.1 At least four test specimens and four control specimens are required for the excrement weight method and at least eight of each for the fabric weight loss method. The specimens must be free of any solvents or carriers used in application of chemical treatments and of any solvents or auxiliary agents used in subsequent durability testing.
6.2 Fabrics—Test specimens, each with an area of 12.9 cm 2 (2 in. 2 ), are cut from widely spaced portions of the fabric.
6.3 Yarns—Test specimens of each yarn are prepared by uniformly winding one layer of yarn on a square or rectangu- lar piece of glazed cardboard, glass or metal with an area of 12.9 cm 2 (2 in. 2 ). The surface of the glazed cardboard, glass or metal must be substantially covered by the yarn. 6.4 Carpets—Test specimens, each with an area of 12.9 cm 2 (2 in. 2 ), are cut from widely-spaced portions of the car- pet. The edges of the specimens are secured by coating the backing yarns with cellulose nitrate dissolved in acetone (see 15.3). For the weight loss method, specimens are prepared by stapling pieces of yarn removed from the specimen to pieces of glazed paper, each having an area of 12.9 cm 2 (2 in. 2 ) so that the sur- face is covered substantially by the yarn.
6.5 Control Specimens for Insect Activity—Control specimens of the stan- dard control fabric (see 15.2), each having an area of 12.9 cm 2 (2 in. 2 ), are exposed under the same conditions as the test specimens. If the fabric or yarn to be tested has been treated with some form of insecticide for the purpose of increasing its resistance to insect pests, specimens of the same fabric or yarn in the untreated condition should be exposed for compari- son, if possible.
6.6 It is important that various lots of fabric for control specimens and lots of fabric and other materials used as rearing medium be thoroughly checked to determine their suitability prior to use.AATCC 24 pdf download.