GB/T 33075-2016 in English
VALIDReactive dyes一Determination of substantivity
- Issued on:2016-10-13
- Implemented on:2017-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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| Standard No: | GB/T 33075-2016 |
| Document status: | VALID |
| Title in English: | Reactive dyes一Determination of substantivity |
| Title in Chinese: | 反应染料 直接性的测定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-10-13 |
| Implemented on: | 2017-05-01 |
| ICS Classification: | 71.100.01-Products of the chemical industry in general |
| Chinese Classification: | G55-Basic standards and general methods for dye |
| Professional Classification: | GB-National Standard |
| Related Keywords: | reactive dyes一determination
reactive dyes reactive dyes cot substantivity introduction reactive |
| Related Topics: | Benzyl reactivity
Bromination reaction, the raw material has not reacted GB/T 33075 gb/t33075 GB/T33075-2016 reactive system GBT33075 GB/T 33075-2016 Nitrile reaction |
《GB/T 33075-2016反应染料 直接性的测定》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
1. Background and significance of the standard
GB/T 33075-2016 "Determination of directness of reactive dyes" is a national standard of the People's Republic of China, which is used to regulate the determination method of directness of KN and M reactive dyes. This standard is managed by the National Technical Committee for Standardization of Dyes and is applicable to directness evaluation in the field of dye production and application.
2. Comparison of standard frameworks
| Standard dimensions | GB/T 33075—2016 | Related international standards |
|---|---|---|
| Scope of application | KN type and M type reactive dyes | COT 42-087 (ISO) |
| Determination principle | Based on 30-minute dye uptake | DIN 6122 |
| Equipment requirements | Spectrophotometer, laboratory dyeing machine | AATCC Test Method 85 |
3. Practical application cases
Take a certain KN type dye as an example, the dyeing depth on cotton yarn is 1% (owf), the bath ratio is 1:20, the temperature is 60℃, and the dyeing time is 30 minutes. The absorbance values of the standard dye solution and the dyeing residual solution measured by a spectrophotometer are A1=0.5 and A2=0.4 respectively, and the dilution multiples n1=2 and n2=3. Calculate directness S:
S = 1 - (A2/n2) / (A1/n1) × 100% = 1 - (0.4/3)/(0.5/2) × 100% ≈ 60%4. Implementation Suggestions
a. Ensure equipment calibration: Spectrophotometers need to be calibrated regularly to ensure the accuracy of absorbance measurements.
b. Operator training: Master standard operating procedures and exception handling methods.
c. Data recording and analysis: Establish a data management system to facilitate trend analysis and quality traceability.
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