This document specifies the product classification and labeling, technical requirements, inspection rules, marking, packaging, storage, transport, and corresponding test methods for corn dyed yarns.
This document is applicable to yarns made from staple fibers and processed using the corn dyeing technique.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour
GB/T 2910 (All parts) Textiles - Quantitative chemical analysis
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3291.1 Textiles - Terms of textile material properties and test - Part 1: Fibre and yarn
GB/T 3292.1 Textiles - Unevenness of textile strands - Part 1: Capacitance method
GB/T 3916 Textiles - Yarns from packages - Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester
GB/T 3920 Textiles - Tests for colour fastness - Color fastness to rubbing
GB/T 3921-2008 Textiles - Tests for colour fastness - Colour fastness to washing with soap or soap and soda
GB/T 3922 Textiles - Tests for color fastness - Color fastness to perspiration
GB/T 4743 Textiles - Yarn from packages - Determination of linear density (mass per unit length) by the skein method
GB/T 5713 Textiles - Tests for color fastness - Color fastness to water
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8427-2019 Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc
GB/T 14576 Textiles - Tests for colour fastness - Colour fastness to light of textiles wetted with artificial perspiration
GB/T 17592 Textiles - Determination of the banned azo colourants
GB 18401 National general safety technical code for textile products
GB/T 29862 Textiles - Identification of fiber content
FZ/T 01057 (all parts) Test method for identification of textile fibers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3291.1 and the following apply.
3.1
color difference between dyed corns
color difference between bobbins dyed in the same dyeing vessel
[Source: GB/T 5705-2018, 6.14]
3.2
color difference between dyeing vessels
color difference between yarns dyed in different dyeing vessels
[Source: GB/T 5705-2018, 6.15, modified]
3.3
color difference between bobbin's layers
color difference among the outer, middle, and inner layers along the radial direction of the bobbin
[Source: GB/T 5705-2018, 6.16]
4 Product classification and labeling
4.1 In corn dyed yarns, K shall be used as the code for yarns intended for knitting, and W shall be used as the code for yarns intended for weaving.
4.2 When corn dyed yarns are labeled with codes, the product color, color card number, and the codes for manufacturing technique and fiber composition shall be indicated in front of the line density, while the code for knitting or weaving yarns shall be indicated right after the line density.
Example 1: A red (or corresponding color card number) combed polyester/cotton blended corn dyed yarn with a linear density of 14.8 tex, composed of 65% polyester and 35% cotton, and intended for knitting, shall be labeled as: Red (or corresponding color card number) JT/C 65/35 14.8 tex K.
Note 1: JT/C is the code for combed polyester/cotton blended yarn.
Example 2: A black (or corresponding color card number) corn dyed yarn with a linear density of 14.8 tex, made of carded cotton and intended for weaving, shall be labeled as: Black (or corresponding color card number) C 14.8 tex W.
Note 2: C is the code for carded cotton.
Contents Foreword 1 Scope 2 Normative references 3 Terms and definition 4 Product classification and labeling 5 Technical requirements 6 Test methods 7 Inspection rules 8 Marking, packaging, storage, and transport Bibliography
GB/T 24345-2025 Corn dyed yarns
1 Scope
This document specifies the product classification and labeling, technical requirements, inspection rules, marking, packaging, storage, transport, and corresponding test methods for corn dyed yarns.
This document is applicable to yarns made from staple fibers and processed using the corn dyeing technique.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour
GB/T 2910 (All parts) Textiles - Quantitative chemical analysis
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3291.1 Textiles - Terms of textile material properties and test - Part 1: Fibre and yarn
GB/T 3292.1 Textiles - Unevenness of textile strands - Part 1: Capacitance method
GB/T 3916 Textiles - Yarns from packages - Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester
GB/T 3920 Textiles - Tests for colour fastness - Color fastness to rubbing
GB/T 3921-2008 Textiles - Tests for colour fastness - Colour fastness to washing with soap or soap and soda
GB/T 3922 Textiles - Tests for color fastness - Color fastness to perspiration
GB/T 4743 Textiles - Yarn from packages - Determination of linear density (mass per unit length) by the skein method
GB/T 5713 Textiles - Tests for color fastness - Color fastness to water
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8427-2019 Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc
GB/T 14576 Textiles - Tests for colour fastness - Colour fastness to light of textiles wetted with artificial perspiration
GB/T 17592 Textiles - Determination of the banned azo colourants
GB 18401 National general safety technical code for textile products
GB/T 29862 Textiles - Identification of fiber content
FZ/T 01026 Textiles - Quantitative chemical analysis - Quantitative fibre mixtures
FZ/T 01057 (all parts) Test method for identification of textile fibers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3291.1 and the following apply.
3.1
color difference between dyed corns
color difference between bobbins dyed in the same dyeing vessel
[Source: GB/T 5705-2018, 6.14]
3.2
color difference between dyeing vessels
color difference between yarns dyed in different dyeing vessels
[Source: GB/T 5705-2018, 6.15, modified]
3.3
color difference between bobbin's layers
color difference among the outer, middle, and inner layers along the radial direction of the bobbin
[Source: GB/T 5705-2018, 6.16]
4 Product classification and labeling
4.1 In corn dyed yarns, K shall be used as the code for yarns intended for knitting, and W shall be used as the code for yarns intended for weaving.
4.2 When corn dyed yarns are labeled with codes, the product color, color card number, and the codes for manufacturing technique and fiber composition shall be indicated in front of the line density, while the code for knitting or weaving yarns shall be indicated right after the line density.
Example 1: A red (or corresponding color card number) combed polyester/cotton blended corn dyed yarn with a linear density of 14.8 tex, composed of 65% polyester and 35% cotton, and intended for knitting, shall be labeled as: Red (or corresponding color card number) JT/C 65/35 14.8 tex K.
Note 1: JT/C is the code for combed polyester/cotton blended yarn.
Example 2: A black (or corresponding color card number) corn dyed yarn with a linear density of 14.8 tex, made of carded cotton and intended for weaving, shall be labeled as: Black (or corresponding color card number) C 14.8 tex W.
Note 2: C is the code for carded cotton.
Contents of GB/T 24345-2025
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definition
4 Product classification and labeling
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, storage, and transport
Bibliography
