1、Designation: D6321/D6321M 13D6321/D6321M 14Standard Practice forthe Evaluation of Machine Washable T-Shirts1This standard is issued under the fixed designation D6321/D6321M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers test methods and procedures used to evaluate important characteristics of machine washable T-s
3、hirts.T-shirts may be made of knitted fabric composed of any textile fiber(s) or blend of fibers and intended to be used as underwearor as an outer garment.1.2 T-shirts characteristics may be assessed either as a final product or at any intermediate processing stage.1.3 This practice excludes T-shir
4、ts intended for hand washing or dry cleaning care.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values fr
5、om thetwo systems may result in non-conformance with the standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standards to establish appropriate safety and health practices and determine the ap
6、plicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD3786 Test Method for Bursting Strength of Textile FabricsDiaphragm Bursting Strength Tester MethodD3787 Test Method f
7、or Bursting Strength of TextilesConstant-Rate-of-Traverse (CRT) Ball Burst TestD3887 Specification for Tolerances for Knitted FabricsD3940 Test Method for Bursting Strength (Load) and Elongation of Sewn Seams of Knit or Woven Stretch Textile Fabrics(Withdrawn 1995)3D4154 Performance Specification fo
8、r Mens and Boys Knitted and Woven Beachwear and Sports Shirt FabricsD4156 Performance Specification for Womens and Girls Knitted Sportswear FabricsD7022 Terminology Relating to Apparel2.2 AATCC Test Methods:4Evaluation Procedure 1, Gray Scale for Color ChangeEvaluation Procedure 2, Gray Scale for St
9、ainingEvaluation Procedure 7, Instrumental Assessment of the Change in Color of a Textile SpecimenMethod 107, Colorfastness to WaterMethod 150, Dimensional Changes of Garments after Home LaunderingMethod 172, Colorfastness to Powered Non-Chlorine Bleach in Home LaunderingMethod 179, Skewness Change
10、in Fabric and Garment Twist Resulting from Automatic Home Laundering2.3 Other Documents:A Glossary of AATCC Standard Terminology4Standardization of Home Laundry Test Conditions41 This practice is under the jurisdiction of ASTM Committee D13 on Textiles, and is the direct responsibility of Subcommitt
11、ee D13.61 on Apparel.Current edition approved March 1, 2013Feb. 1, 2014. Published April 2013March 2014. Originally approved in 1998. Last previous edition approved in 20042013 asD6321 98D6321 13.(2004). DOI: 10.1520/D6321_D6321M-13.10.1520/D6321_D6321M-14.2 For referencedASTM standards, visit theAS
12、TM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from A
13、ATCC, PO Box 12215, Research Triangle Park, NC 27709.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes acc
14、urately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United St
15、ates13. Terminology3.1 For all terminology relating to D13.61 D13.61, Apparel, refer to Terminology D7022.3.1.1 The following terms are relevant to this standard: T-shirt.3.1.2 For definitions of other textile terms used in this standard, refer to terminology in Terminology D123 and Glossary ofAATCC
16、 Standard Terminology.4. Significance and Use4.1 This practice may be used to evaluate pertinent characteristics of washable T-shirts.4.2 T-shirts may be subject to extra processes such as garment dyeing, garment washing, printing, application of embroideryor trims. An individual process or combinat
17、ion or processes may affect the performance of the final product.4.3 This practice may be used by mutual agreement between the purchaser and the supplier to establish purchasingspecifications.5. Sampling, Selection, and Number of Specimens5.1 Lot SampleTake a lot sample as directed in an applicable
18、material specification or as agreed between purchaser andsupplier, such as an agreement to take at random some fixed number of shipping containers or garments from each lot.5.2 Laboratory SampleFrom each lot sampling unit, take five T-shirts to be used as the laboratory sample.5.3 Test SpecimenFrom
19、each laboratory sample, two T-shirts are to be tested as-received and two T-shirts that are to belaundered. The fifth T-shirt is to be retained as a control specimen and not tested.6. Fabric Performance Characteristics6.1 Evaluate fabric designated for T-shirt manufacture using Specification D3887,
20、D3787, Performance Specification D4154,or Performance Specification D4156 as appropriate.7. Garment Performance Characteristics7.1 Assessments Prior to Machine Laundering (As-Received State):7.1.1 Condition T-shirts in standard atmospheres for testing 20 6 3C 70 6 2F and 65 6 2 % RH according to Pra
21、cticeD1776 for 4 hrs.7.1.2 Shade DifferenceExamine each of the four T-shirts for shade difference, garment panel-to-panel, using AATCCEvaluation Procedure 1 or 7.NOTE 1Difference results may be obtained when using the subjecting assessment in AATCC Evaluation Procedure 1 when using the instrumentala
22、ssessment in AATCC Evaluation Procedure 7.7.1.3 DefectsExamine the four T-shirts for needle cutting, seam appearance, surface irregularities, or any other defect andrecord the information.7.1.4 Seam PerformanceDetermine seam performance for the two as-received T-shirts as directed in Test Method D39
23、40.7.1.5 Bursting ForceIf the fabric is not available for 6.1, determine bursting strength on the as-received T-shirts using D3787or D3786.7.2 Specimen Preparation Prior to Laundering:7.2.1 Condition T-shirts to the standard atmospheres of 20 6 3C 70 6 2F and 65 % RH as specified in Practice D1776 f
24、orat least 4 h.7.2.2 Lay the two T-shirts designated for laundering on a flat surface without tension, aligning sides and sleeves and smoothingto minimize folds and wrinkles.7.2.3 Mark the dimensions to be measured with an indelible marking pen.7.2.3.1 For garment dimensional change, mark the locati
25、ons according toAATCC TM 150 and as shown in Fig. 1 using a plasticor metal tape graduated in increments of millimetres 116 in.:7.2.3.2 Chest WidthPlace marks “A1” and “A2” 125 mm 5.0 in below each armhole seam. This is Distance “A”. Measureand record the distance across the chest to the nearest mm
26、116 in.7.2.3.3 Front LengthFold the T-shirts in half lengthwise, back-to-back, matching shoulder and neck band seams. Lay thefolded T-shirts flat on a smooth surface. Place marks “B1” and “B2” 25 mm 1 in. below the center neck band and 25 mm 1 in.above the bottom hem. This is Distance “B”. Measure a
27、nd record the distance between the upper and lower marks to the nearestmm 116 in.7.2.3.4 Sleeve LengthPlace two T-shirts flat on a smooth surface. Mark the distance between the upper shoulder joining to thelower edge of the sleeve hem. This is Distance “C”. Measure and record the distance between th
28、e marked shoulder seam and thehem edge to the measure mm 116 .7.2.3.5 Sleeve SeamPlace T-shirts flat on a smooth surface. Measure and record the distance between the upper shoulderjoining and the underarm seam intersection to the nearest mm 116 in. This measurement is Distance “D”.D6321/D6321M 1427.
29、2.3.6 Sleeve OpeningPlace T-shirts flat with the sleeves folded. Measure and record the distance between the upper edgeof the sleeve hem to the lower edge of the sleeve on the outer edge to the nearest mm 116 in. This is Distance “E”. The measureddistance should be doubled and recorded.7.2.3.7 Neck
30、OpeningGrasp the neck band at the center back and the center front, forming a folded edge. Measure across thefolded band. This is Distance “F”. The measured distance should be doubled and recorded.7.2.4 Skewness ChangeMark the T-shirts according to AATCC Test Method 179, marking Option 3. See Fig. 2
31、.7.2.5 Colorfastness to WaterFor dyed or printed T-shirts, prepare specimens for colorfastness to water according to AATCCTest Method 107.NOTE 2It has been reported that the results for staining, obtained by standard AATCC Test Methods, on fabrics dyed to dark shades that contain acombination of pol
32、yester and spandex, or their blends, may not show the full staining propensity of such fabrics in consumer use. It is, therefore,recommended that the staining results obtained by these tests not be used for acceptance testing of such fabrics.7.3 Laundering Conditions:7.3.1 Wash and dry the two T-shi
33、rts designated for laundering using the information on the care label and the applicableprocedure inAATCC Test Method 150. Use washing and drying conditions that conform to those given in theAATCC monograph(see 2.3).7.3.2 If colorfastness to non-chlorine bleach is specified on the care label, use AA
34、TCC Test Method 172. For chlorine bleachcolorfastness, follow bleach manufacturers recommendations for volume of use and the sequence of addition and the care labelinstructions on the T-shirt or requirements agreed upon between the purchaser and supplier.7.4 Assessment after Machine Laundering:7.4.1
35、 Dimensional ChangeMeasure the dimensional change distances after laundering and calculate percent dimensionalchange as directed in AATCC Test Method 150.7.4.2 Skewness ChangeMeasure the marked distances after laundering and calculate percent skewness change according tothe AATCC Test Method 179, Op
36、tion 3.NOTE 1Refer to AATCC Test Method 150.FIG. 1 Dimensional Change Marking LocationRefer to AATCC Test Method, 179 Marking, Option 2: AB = Before Laundering and AB or A“B = After laundering.FIG. 2 T-Shirt Skewness Change, Marking LocationsD6321/D6321M 1437.4.3 StainingGrade staining of a dyed or
37、printed T-shirts by using AATCC Test Method 107 and Evaluation Procedure 2. Ifmultifiber or crock square swatches were sewn on the T-shirts before laundering, evaluate the staining performance using AATCCEvaluation Procedure 2.7.4.4 Shade DifferenceDetermine shade differences. Rate change of color o
38、n dyed or printed T-shirts from panel to panel andagainst the original T-shirt. Rate staining using AATCC Evaluation Procedure 2.7.4.5 DefectsExamine T-shirts for defect agreed upon by the purchaser and the supplier.7.4.6 Seam PerformanceAssess seam failure as directed in Test Method D3940.8. Report
39、8.1 State that the specimens were tested as directed in Practice D6321. Describe the identification of the T-shirt material andthe method of sampling used.8.2 Report the following information:8.2.1 The number of T-shirts tested, and8.2.2 The performance characteristics assessed and the results of ea
40、ch.9. Conformance9.1 When the purchaser and supplier have agreed upon specific requirements for the characteristics assessed, the T-shirts thatfail to meet the requirements may be rejected.10. Keywords10.1 T-shirtsASTM International takes no position respecting the validity of any patent rights asse
41、rted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by
42、 the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receiv
43、e careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Intern
44、ational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D6321/D6321M 144
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