AATCC 129-2005 耐高温大气中臭氧色牢度1.pdf
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1、标准分享网 w w w . b z f x w . c o m 免费下载 Copyright 2006 American Association of Textile Chemists and Colorists AATCC Technical Manual/2007TM 129-2005211 Developed in 1962 by AATCC Commit- tee RA33; editorially revised 1973, 1974, 1981, 1989, 1997; revised 1972, 1975, 1985, 2005; reaffirmed 1990, 2001; e
2、ditorially revised and reaffirmed 1996. Partly equivalent to ISO 105-G03. 1. Purpose and Scope 1.1 This test method is used for deter- mining the resistance of the color of tex- tiles to the action of ozone in the atmo- sphere at elevated temperatures with relative humidities above 85%. 2. Principle
3、 2.1 A test specimen and a swatch of control sample are simultaneously ex- posed to ozone in an atmosphere which is maintained at 87.5 2.5% RH and a tem- perature of 40 1C (104 2F) until the control sample shows a color change cor- responding to that of a standard of fading. The cycles are repeated
4、until the speci- men shows a definite color change or for a prescribed number of cycles. 2.2 On certain fibers, dye fading does not readily take place at humidities below 85%. Testing at high humidities is re- quired to produce color change that pre- dicts service fading under warm, humid conditions
5、 (see 11.1). 3. Terminology 3.1 colorfastness, n.the resistance of a material to change in any of its color characteristics, to transfer of its color- ant(s) to adjacent materials or both, as a result of the exposure of the material to any environment that might be encoun- tered during the processin
6、g, testing, stor- age or use of the material. 4. Safety Precautions NOTE: These safety precautions are for information purposes only. The pre- cautions are ancillary to the testing proce- dures and are not intended to be all inclu- sive. It is the users responsibility to use safe and proper techniqu
7、es in handling materials in this test method. Manufac- turers MUST be consulted for specific details such as material safety data sheets and other manufacturers recommenda- tions. All OHSA standards and rules must also be consulted and followed. 4.1 Good laboratory practices should be followed. Wear
8、 safety glasses in all laboratory areas. 4.2 Ozone is a sensory irritant. The test cabinet should be ventilated to the out- side atmosphere in accordance with the manufacturers instructions. 4.3 Exposure to chemicals used in this procedure must be controlled at or below levels set by governmental au
9、thorities (e.g., Occupational Safety and Health Administrations OSHA permissible exposure limits PEL as found in 29 CFR 1910.1000 of January 1, 1989). In addition, the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) comprised of time weighted averages
10、(TLV-TWA), short term exposure limits (TLV-STEL) and ceiling limits (TLV-C) are recommended as a general guide for air contaminant exposure which should be met (see 11.1). 5. Apparatus and Materials 5.1 Ozone Chamber for elevated tem- peratures and relative humidities above 85% (see 11.3). 5.2 Contr
11、ol Sample No. 129 for high humidities (see 11.4, 11.6 and 11.7). 5.3 Standard of Fading No. 129 for high humidities (see 11.5, 11.6 and 11.7). 5.4 Gray Scale for Color Change (see 11.6). 6. Test Specimens 6.1 Cut each test specimen at least 100 60 mm (4.25 2.375 in.). For subse- quent color comparis
12、on, the unexposed sample should be kept in an airtight con- tainer away from light to avoid further shade change. 6.2 When a laundered or drycleaned specimen is used, base the effects of ozone exposure on comparisons with the color of the laundered or drycleaned swatch. In the preparation of specime
13、ns for testing after laundering or dryclean- ing, use AATCC Methods 61 and 132. 7. Procedure 7.1 Suspend test and control specimens (see 11.4 and 11.6) in the exposure cham- ber (see 11.3) which is maintained at 87.5 2.5% RH and a temperature of 40 1C (104 2F). Ozone concentrations must range from 1
14、0-35 pphm which should produce one cycle of fading in 3-28 h of test. 7.2 Examine the control specimen peri- odically until the resulting color corre- sponds to that of the standard of fading (see 11.5 and 11.6) when compared in daylight ranging from average to slightly bluish north sky light, or eq
15、uivalent artifi- cial light. This constitutes one cycle (see 11.8). 7.3 Remove those specimens which exhibit a color change at the end of one cycle. One cycle will generally produce a measurable color change in specimens which are ozone sensitive. 7.4 Suspend a fresh control specimen and continue ex
16、posure of any remaining specimens for a second cycle. 7.5 Run additional similar cycles as necessary. 8. Evaluation 8.1 At the end of each cycle immedi- ately compare those specimens which are removed from the exposure chamber with the preserved original from which they were drawn. 8.2 Rate the effe
17、ct on color of test specimens after any specified number of cycles by reference to the Gray Scale for Color Change, and report the number of cycles run as follows (see 11.10): Grade 5negligible or no color as shown in Gray Scale Step 5. Grade 4.5change in color equivalent to Gray Scale Step 4-5. Gra
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