AATCC 135-2018 Test Method for Dimensional Changes of Fabrics after Home Laundering.
6. Test Specimens
6.1 Sampling and Ppanition.
6,1.1 Samples 1mm which dimensional change specimens are to he taken should be representative of the fabric processing stage. finishing u’catmenL research lab trial. pallet, lot or end-product stage.
6.1.2 Fabrics that are distorted in their unbundered state may give deceptive dimensional change results when laundered by any procedure. In such cases, it is iceommended that .spccimcns not be taken from any distorted area of a Ilibric sum. plc.
6.1.3 Tubular knitted samples should be slit and handled flat in a single layer. Only circular knitted fabrics produced on bodywidth machines are to be used as specimens in their tubular lbnn. Circular knitted fabrics made on bodywidth machines are ones to be used in gannents with no side seams. Flodywidth tubular circular knitted garments and seamless garments (knit-to-wear) should be tested according to AATCC TM 150. Diniunsional Changes of Garments after I Ionic Laundering (sec 12)).
6.1.4 Specimens tested in accordance with AATCC tMl35 may also be used for testing for skewness change in accordance with Options I or 2 in AAI’CC l’M179. Skew Change in Fabrics After [lomc I .aundcring (sec 12.3).
6.1.5 I fraying of specimens is expected in laundering. reftr to 12.6.
6.1.6 Prior to marking. condition test .specimens as directed in ASTM D1776. Standard Practice for Conditioning and Testing Textiles (see 12.5). (Usc conditions indicated in Table I for ‘kxtilcs, general F.stimate conditioning time us indicated in Table 2 for the appropriate fiber content.) Lay each test specimen flat. separately. on a screen or perforated shell of a conditioning rack.
6.1.7 Lay the sample on a flat surface. Do not allow any section of the sample to hang over the edge oldie work table. Using a template for the selected test size. mark specimens parallel to the selvuge or fabric length direction. Avoid use of thc sample area within ten percent of the sample width. Specimens should be taLn 1mm areas with difli’rent lengthwise and widihwisc yams (Sec Fig. I). Identify the length direction of the specimens before cutting thci out of thc sample. When posshlc. three spccimcns from each fabric should be used. One or two specimens may be used when insullidcnt fabric sample is availahic.
6.2 Mading. MarJ specimens without tension on a flat, smooth horitonuil surface.AATCC 135 pdf download.