1、16 TM 6-2006 AATCC Technical Manual/2007Developed in 1925 by AATCC Commit-tee RR1; revised 1945, 1952, 1957; re-affirmed 1972, 1975, 1978, 1989, 2006;editorially revised and reaffirmed 1981,1986, 1994, 2001; editorially revised1995, 2004. Related to ISO 105-E05and E06.1. Purpose and Scope1.1 Test sp
2、ecimens are evaluated forresistance to simulated action of acidfumes, sizes, alkaline sizes, alkalinecleansing agents and alkaline street dirt.These test methods are applicable to tex-tiles made from all fibers in the form ofyarns or fabrics, whether dyed, printed orotherwise colored.2. Principle2.1
3、 The specimens are steeped in orspotted with the required solutions bymeans of simple laboratory equipment.The tested specimens are examined forchanges in color.3. Terminology3.1 colorfastness, n.the resistance ofa material to change in any of its colorcharacteristics, to transfer of its color-ant(s
4、) to adjacent materials, or both, as aresult of the exposure of the material toany environment that might be encoun-tered during the processing, testing, stor-age or use of the material.4. Safety PrecautionsNOTE: These safety precautions arefor information purposes only. The pre-cautions are ancilla
5、ry to the testing proce-dures and are not intended to be allinclusive. It is the users responsibility touse safe and proper techniques in han-dling materials in this test method. Manu-facturers MUST be consulted for specificdetails such as material safety data sheetsand other manufacturers recommend
6、a-tions. All OSHA standards and rulesmust also be consulted and followed.4.1 Good laboratory practices shouldbe followed. Wear safety glasses in alllaboratory areas.4.2 All chemicals should be handledwith care. Use chemical goggles or faceshield, impervious gloves and an imper-vious apron during dis
7、pensing and mix-ing of hydrochloric acid, acetic acid andammonium hydroxide.4.3 An eyewash/safety shower shouldbe located nearby and a self-containedbreathing apparatus should be readilyavailable for emergency use.5. Apparatus, Materials and Reagents5.1 Beaker, 250 mL5.2 Bell jar, 4 L, with a glass
8、plate base5.3 Evaporating dish5.4 Gray Scale for Color Change (see11.1)5.5 Hydrochloric acid (HCl), 35%5.6 Acetic acid (CH3COOH), 56%5.7 Ammonium hydroxide (NH4OH),anhydrous ammonia 28% (NH3)5.8 Sodium carbonate (Na2CO3), anhy-drous, technical5.9 Calcium hydroxide Ca(OH)2,freshly prepared paste6. Te
9、st Specimens6.1 These may be cut in any convenientsize.7. Procedure7.1 Acid Tests.7.1.1 Spot the specimen with the hy-drochloric acid solution (100 mL of 35%acid made up to 1 L, add acid to water) at21C (70F), and then dry the specimenat room temperature without rinsing.7.1.2 Spot the specimen with
10、aceticacid (56%) and dry it at room tempera-ture without rinsing.7.2 Alkali Tests.7.2.1 Steep the specimen for 2 min at21C (70F) in ammonium hydroxide(28% anhydrous ammonia) and dry it atroom temperature without rinsing.7.2.2 Steep for 2 min at 21C (70F) insodium carbonate (10%) and dry it atroom te
11、mperature without rinsing.7.2.3 Suspend the specimen over a 7.6cm (3 in.) evaporating dish containing 10mL ammonium hydroxide (28% anhy-drous ammonia) for 24 h in a 4 L bell jarplaced on a glass plate.7.2.4 Spot the specimen with calciumhydroxide, a freshly prepared paste, madeby mixing the hydroxid
12、e with a smallamount of water, and dry the specimen.Then brush the specimen to remove thedry powder.8. Evaluation8.1 Rate the effect on the color of thetest specimens by reference to the GrayScale for Color Change (see 11.1).Grade 5negligible or no change asshown in Gray Scale Step 5.Grade 4.5change
13、 in color equivalentto Gray Scale Step 4-5.Grade 4change in color equivalentto Gray Scale Step 4.Grade 3.5change in color equivalentto Gray Scale Step 3-4.Grade 3change in color equivalentto Gray Scale Step 3.Grade 2.5change in color equivalentto Gray Scale Step 2-3.Grade 2change in color equivalent
14、to Gray Scale Step 2.Grade 1.5change in color equivalentto Gray Scale Step 1-2.Grade 1change in color equivalentto Gray Scale Step 1.9. Report9.1 In reporting results of these tests,state the reagent used as given in the fol-lowing example:“This material is in Grade.with re-spect to colorfastness to
15、 hydrochloricacid, etc.”10. Precision and Bias10.1 Precision. Precision for this testmethod has not been established. Until aprecision statement is generated for thistest method, use standard statistical tech-niques in making any comparisons of testresults for either within-laboratory orbetween-labo
16、ratory averages.10.2 Bias. The colorfastness to acidsand alkalis can be defined only in termsof a test method. There is no independentmethod for determining the true value.As a means of estimating this property,the method has no known bias.11. Note11.1 Available from AATCC, P.O. Box12215, Research T
17、riangle Park NC27709; tel: 919/549-8141; fax: 919/549-8933; e-mail: ordersaatcc.org.AATCC Test Method 6-2006Colorfastness to Acids and AlkalisCopyright The American Association of Textile Chemists and Colorists Provided by IHS under license with AATCC Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
