AATCC LP5-2023 Laboratory Procedure for Home Laundering with Bleach Foreword Sampling Design. 6.2 Water quality and hardness are not This procedure is based on laundering defined in this procedure. Since most lab- 4. Terminology oratories use local water sources for laun- methods and parameters originally devel- dering, it is generally impractical to con- oped as part of various AATCC stan- 4.1 bleach, n.—in home laundering, a trol parameters. In cases of critical testing dards. As a stand-alone laundering proto- productthat will clean,whiten,brighten or unexpected results, additional testing col, it may be combined with other test and aid in the removal of soils and stains and comparison may help isolate sources methods, including those for appearance fromtextilematerialsby oxidationthat is and care label verification. of variability. inclusive of chlorine and non-chlorine Standard laundering procedures re- products. main consistent to allow valid compari- 7.Apparatus and Materials (see19.2) 4.2 chlorine bleach, n. -a solution of son ofresults.Standardparameters repre- sodium hypochlorite (NaOCl) that will 7.1 Automatic washing machine (see replicate. clean, whiten, brighten and aid in the re- Table I, 19.3). current consumer practices, which vary moval of soils and stains from textile ma- 7.1.1 Graduated pail, for washing ma- overtime and among households.Alter terials. chine water level verification. nate laundering parameters (water level, 4.3laundering,n.of textile materi- 7.1.2Ruler, 1-m, for washing machine agitation,temperature,etc.)arelisted in als, a process intended to remove soils water level verification. AATCC LP1. and/or stainsbytreatment (washing)with 7.1.3 Stopwatch or timer, for washing an aqueous detergent solution and nor- machine agitation speed verification 1. Purpose and Scope mally including rinsing, extraction and 7.1.4 Tachometer, for washing ma- drying. chine spin speed verification. 1.1 This procedure provides standard 4.4 non-chlorine bleach,n.a prod- 7.2 Tumble dryer (see Table II, 19.3) conditions for home laundering with uct that will clean, whiten, brighten and or facilities for drip/line/flat drying. bleach, using an automatic washing ma- aid in the removal of soils and stains from 7.3 Balance with at least 5.0-kg capac- chine. Option 1 is for sodium hypochlo- textile materials without the release the ity, for laundering load. rite ("chiorine bleach"). Option 2 is for hypochlorite ion in solution. 7.4Laundering ballast Type 3 (see Ta sodium percarbonate ("non-chlorine NOTE: Powdered non-chlorine bleach ble IV). Use of alternate ballast material bleach") typically contains sodium percarbonate may affect test results. 1.2 This test is applicable to all fabrics (Na2CO3-1.5 H202) as its active ingredi- 7.5 Analytical balance, 0.001-g read- and end products suitablefor home laun- ent.Liquid non-chlorinebleach typically ability,for reagents. dering. It may be used to determine containshydrogenperoxide(H2O2)as whether a sample is suitable for launder- its active ingredient. When dissolved in 8.Reagents ing with chlorine and/or non-chlorine water,sodiumpercarbonateliberateshy- bleach. drogen peroxide; the chemistry for laun- 8.1 1993 AATCC Standard Reference dering with both forms of non-chlorine Detergent WITHOUT brightener (WOB, 2. Principle bleach is the same. powder) (see 19.1). 8.2 Laundering bleach (see 19.4). 2.1 Home laundering procedures with 5. Safety Precautions 8.2.1 For Option 1 (chlorine bleach): chlorine and non-chlorine bleach are de- sodium hypochlorite (NaOCI), 5% avail- scribed. Textile samples may be tested for 5.1 The safety precautions specified in able chlorine (see 19.5) compatibility with one or both types of the method/procedure are ancillaryto the 8.2.2 For Option 2 (powdered non- bleach, but bleaches must not be com- testing procedures and are not intended chlorine bleach): sodium percarbonate bined in a single test. The procedures de- to be all inclusive (Na2CO3·1.5 H202),