AATCC LP1-2021 Laboratory Procedure for Home Laundering: Machine Washing Foreword ing machine drum. Detergent (powder) or AATCC High Ef- NOTE: This motion can be in one di- ficiency (HE) Standard Reference Liquid This procedure is based on laundering rection (i.e., clockwise or counter-clock- Detergent (see 17.3, 17.4). methods and parameters originally devel- wise), or alternate back and forth. In ei- 6.4 Scale with at least 5.0-kg (10.0-1b) oped as part of various AATCC stan- ther case, the motion shall be counted at dards. As a stand-alone laundering proto- capacity. each pause, or change of direction. For 6.5 Laundering ballast Type 1, Type 3, col, it may be combined with other test example,one set of back andforthmo- or Type 4 (see Table VII). methods, including those for appearance, tions shall be considered two strokes.In NOTE:When Type 4ballastis se care label verification, and flammability. thecaseof unidirectional agitation,each lected, the ballast shall be agreed upon by A procedure for hand laundering may be pause of the motion shall be counted both parties, and shall be described in the found in AATCC LP2, Laboratory Proce- 3.3 stroke length, n.—of washing ma- report. dure for Home Laundering: Hand Wash- chines,the degree of rotation in a single ing. movement (stroke)during the agitation Standard laundering procedures re- 7. Verification cycle of the wash. main consistent to allow valid compari- 7.1 Verify top-loading washing ma- son of results.Standardparameters repre- 4. Safety Precautions chine parameters before running a test, or sent, but may not exactly replicate, at minimum, once a year.No laboratory current consumer practices,which vary NOTE: These safety precautions are verification methods are currently avail- over time and among households.Alter- for information purposes only.The pre- able for front loading machines. nate laundering parameters (water level, cautions are ancilary to the testing proce- 7.2 Water level verification agitation, temperature, etc.) are updated dures and are not intended to be all inclu- 7.2.1 Using a graduated pail, fill ma- periodically to more closely mirror con- sumer practices and allow use of avail- sive. It is the user's responsibility to use chine with room-temperature water until ableconsumermachines,thoughdifferent safe andproper techniques in handling it totals the specified volume. materials in this procedure. Manufactur- 7.2.2 Vertically, (perpendicularly to parameters may produce different test re- ers MUST be consulted for specific de- sults. water surface),submerge an 1-m ruler tails such as material safety data sheets until it touches the bottom of the machine and other manufacturer's recommenda- drum. Using a permanent ink marker, 1. Purpose and Scope tions. All OSHA standards and rules draw a line onthe ruler atthe point of must alsobe consulted and followed. contact with the surface of the water. 1.1 This procedure provides standard 4.1 Good laboratory practices should Drain water from drum. and alternate home laundering conditions be followed. Wear safety glasses in all 7.2.4 Begin cycle, stopping when fill is using an automatic washing machine. laboratory areas complete (before agitation begins). Use Whie the procedure includes several op- 4.2Detergent may cause irritation. themarked rulerto verifywaterlevel. tions, it is not possible to include every Care shouldbetakentoprotect skinand Ensure ruler is submerged at the same existing combination of laundering pa- eyes from exposure. place as when it was marked. rameters. 4.3 Manufacturer's safety recommen- 7.3Agitation rate 1.2 This test is applicable to all fabrics dations should be followed when operat- 7.3.1 To facilitate counting the number and endproducts suitableforhome laun- ing laboratory testing equipment. dering. of strokesperminuteduringagitationin the wash cycle, tape one end of a short 5. Uses and Limitations ruler or rod (approximately 150-mm) to 2. Principle the center point on the top of the