T/CTES 1037-2021 in English
VALIDVegetable dyes for textiles—Rubia cordifolia
- Issued on:2021-03-16
- Implemented on:2021-04-15
- File Format:PDF
- Delivery:Via email within 5 business days
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本文件规定了植物茜草染料的要求、采样、试验方法、检验规则以及标志、包装、运输和贮存。
本文件适用于从茜草植物来源提取的植物染料。
Introduction
Analysis of the core content of the standard
| Item | Indicator requirements | Test method |
|---|---|---|
| Appearance | Magenta uniform powder | GB/T2390 visual method |
| pH value | 5.5-6.0 | GB/T2390 potentiometric method |
| Madder dye mass fraction | ≥97% | Appendix A LC-MS method |
Key Technical Requirements
1. Naturalness Identification
Alizarin (1,2-dihydroxyanthraquinone) shall be detected by thin layer chromatography and liquid chromatography/mass spectrometry, and the characteristic peak retention time shall match the standard (CAS:72-48-0). The carbon 14 method (T/CTES1023) shall be used for arbitration.
2. Color fastness index
Suggestions for standard implementation
Key points for production control
- Raw material traceability: Ensure the source of Rubia cordifolia rhizomes
- Process optimization: Extraction temperature ≤80℃ (Appendix A.5.2)
- Heavy metal control: Lead ≤20mg/kg (GB20814)
Application precautions
Recommended dyeing conditions: bath ratio 1:40, 70℃×45min, alum as mordant (Standard 6.4.1)
Technology Evolution Analysis
Compared with traditional synthetic dyes, this standard specifies for the first time the biobased carbon content verification requirements for plant dyes (T/CTES1023), and establishes a complete natural identification system, reflecting the green development trend of the textile industry.
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