GB/T 13770-2009 Textiles - Test method for assessing the appearance of creases in fabrics after cleansing
1 Scope
This standard specifies a test method for assessing the retention of pressed-in creases in fabrics after one or several cleansing treatments. A technique for inserting creases is not included as this is controlled by fabric properties.
This method has been developed for use primarily with type B domestic washing machines, as defined in GB/T 8629, in the cleansing process. However, it may be possible to use it with type A machines, as defined in the same standard.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 251 Textiles- Tests for colour fastness - Grey scale for assessing staining (GB/T 251-2008, ISO 105-A03:1993, IDT)
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing (GB/T 6529-2008, ISO 139:2005, MOD)
GB/T 8629 Textiles - Domestic washing and drying procedures for textile testing (GB/T 8629-2001, eqv ISO 6330:2000)
GB/T 19981 (All parts) Textiles - Professional care, drycleaning and wetcleaning of fabrics and garments [ISO 3175 (All parts)]
3 Principle
3.1 Creased fabric specimens are subjected to procedures simulating cleansing practices. One of the domestic washing and drying procedures specified in GB/T 8629 or one of the professional procedures specified in the series of GB/T 19981 is used, as agreed between the interested parties.
3.2 Assessment is performed by supplementing the overhead lighting arrangement with a spotlight suitably placed to highlight the creased area. The specimens are compared visually with 3D crease appearance replicas under specified illumination.
4 Apparatus
4.1 Washing and drying apparatus, or professional care apparatus
As specified in GB/T 8629 or GB/T 19981.
4.2 Steam or dry iron
With appropriate fabric temperature settings.
Foreword i
1 Scope
2 Normative references
3 Principle
4 Apparatus
5 Test specimens
6 Procedure
7 Expression of results
8 Test report
Annex A (Informative) Precision and bias statement
