GB/T 7568.7-2008 in English

《GB/T 7568.7-2008纺织品 色牢度试验 标准贴衬织物 第7部分：多纤维》由TC209（全国纺织品标准化技术委员会）归口，TC209SC1（全国纺织品标准化技术委员会基础标准分会）执行，主管部门为中国纺织工业联合会。
GB/T 7568《纺织品 色牢度试验 标准贴衬织物》分为七个部分，本部分为GB/T 7568的第7部分。
本部分使用重新起草法修改采用ISO 105-F10:1989《纺织品 色牢度试验 F10部分：多纤维贴衬织物规格》（英文版），并参考了2008年最新修正草案的内容。
本部分代替GB 11404-1989《纺织品 色牢度试验 多纤维标准贴衬织物规格》。
GB/T 7568的本部分规定了纺织品色牢度试验中评定沾色的未染色多纤维贴衬织物的通用要求。多纤维贴衬织物具有标准化的沾色性能。
本部分与GB 11404-1989相比主要变化如下：
――标准名称改为“纺织品 色牢度试验 标准贴衬织物 第7部分：多纤维”；
――由强制性标准调整为推荐性标准；
――规范性引用文件中增加了GB/T 250、GB/T 251、GB/T 8424.2、FZ/T 01023和FZ/T 01024，删除GB/T6151；
――将“原理”改为“通用要求”；
――将多纤维贴衬织物的类型由“SW、SV”改为“DW、TV”；
――增加了醋酯纤维和三醋酯纤维作为多纤维贴衬织物的织条；
――删除了丝纤维作为多纤维贴衬织物的织条；
――增加了对各种纤维的光泽等级要求，并修改了棉、聚丙烯腈纤维和羊毛的线密度要求以及棉、聚酰胺纤维、羊毛和粘胶纤维的长度要求；
――修改了各种纱线的线密度和捻度要求；
――增加了各织条的白度要求；
――修改了多纤维贴衬织物的幅宽和织物密度，并增加了组织形式；
――附录A中贴衬织物的沾色性能指标由“基准贴衬织物和待试贴衬织物的沾色，其级数在差异以不超过半级为合格（含半级）”改为“当色差不低于4-5级时，则等试贴衬织物的沾色性能可以接受”，并增加了使用仪器评级方法对沾色后的待试贴衬织物和基准贴衬织物进行评定；
――修改了附录A中的染料种类及参考浓度。

1 Scope

This standard of GB/T 7568 specifies the general requirements for evaluating uncolored multifibre accompanying fabric among the stained in tests for textile colour fastness.

2 Normative References

The following documents contain provisions which, through reference in GB/T 7568, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 250 Textiles—Tests for colour fastness—Grey scale for assessing change in colour (GB/T 250—2008, ISO 105-A02: 1993, IDT)
GB/T 251 Textiles—Tests for colour fastness—Gray scale for assessing staining (GB/T 251—2008, ISO 105-A03: 1993, IDT)
GB/T 3921—2008 Textiles—Tests for colour fastness—Colour fastness to soaping (GB/T 3921—2008, ISO 105-C10: 2006, MOD)
GB/T 7568.1 Textiles--Tests for colour fastness--Specification for wool adjacent fabric (GB/T 7568.1—2002, ISO 105-F01: 2001, MOD)
GB/T 7568.2—2008 Textiles—Tests for colour fastness—Standard adjacent fabrics Part 2: Cotton and viscose
GB/T 7568.3 Textiles—Tests for colour fastness—Standard adjacent fabrics Part 3: Polyamide (GB/T 7568.3—2008, ISO 105-F03: 2001, MOD)
GB/T 7568.4 Textiles--Tests for colour fastness--Specification for polyester adjacent fabric (GB/T 7568.4—2002, ISO 105-F04: 2001, MOD)
GB/T 7568.5 Textiles--Tests for colour fastness--Specification for acrylic adjacent fabric (GB/T 7568.5—2002, ISO 105-F05: 2001, MOD)
GB/T 7568.6 Textiles--Tests for colour fastness--Specification for silk adjacent fabric (GB/T 7568.6—2002, ISO 105-F06: 2000, MOD)
GB/T 8424. 2 Textiles--Tests for colour fastness--Instrumental assessment of relative whiteness (GB/T 8424. 2—2001, eqv ISO 105-J02: 1997)
FZ/T 01023 Instrumental assessment of the degree of staining of adjacent fabrics (FZ/T 01023—1993, neq ISO 105-A04: 1989)
FZ/T 01024 Instrumental assessment of the discoloration degree of sample (FZ/T 01024—1993, neq ISO 105-A05: 1992)

3 General Requirements

3.1 Each component of fiber composing multifibre accompanying fabric shall possess similar staining performance with the fiber of single fibre adjacent fabric specified in corresponding part of GB/T 7568. The staining performance of multifibre accompanying fabric shall be determined by methods in Annex A.
3.2 The description of two types of multifibre accompanying fabric is listed in Table1.
Wool and acetate fibre shall not be used for some tests for colour fastness. In this case, the DW type multifibre accompanying fabric may be replaced by TV type.