HG/T 2748-1996 Direct Red B (Direct Acid Resistant Red 4BS) HG/T2748-1996 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2748—1996
Direct Red B
(Direct Acid-Resistant Red 4BS)
Published on April 8, 1996
Published by the Ministry of Chemical Industry of the People's Republic of China and implemented on January 1, 1997
WHG/T2748—1996
This standard is revised on the basis of GB/T1651—82. This standard modifies the writing format of the original standard in accordance with the provisions of GB/T1.1—1993.
The dyeing fastness of Direct Red B on cotton fabrics specified in the standard is the result of testing using the current national standard. Based on the product quality data provided by the relevant manufacturers and on the basis of extensive consultation with users, this standard has revised the original moisture index.
This standard has been adjusted to the industry standard after revision. From the date of implementation of this standard, the original GB/T1651-82 will be abolished. This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the technical jurisdiction of the Shenyang Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Dyeing and Chemical Plant No. 3 and Shenyang Chemical Research Institute. The main drafters of this standard are Wang Xiuqin and Qi Tingting. This standard was first issued in December 1965, adjusted from a departmental standard to a national standard in November 1979, and revised in 1982. 1
W.bzsoso.cOm1 Scope
Chemical Industry Standard of the People's Republic of China
Direct Red B
(Direct Acid-Resistant Scarlet 4BS)
HG/T2748—1996
This standard specifies the requirements, sampling, test methods, inspection rules, and marking, packaging, transportation and storage of Direct Red B. This standard applies to Direct Red B prepared by coupling p-aminoacetanilide diazo compound with scarlet acid in an alkaline medium. Structural formula:bzxz.net
Molecular formula: CssH25N,S2O10Na2
NICG·N
Relative molecular mass: 790.69 (according to the 1991 international relative atomic mass) 2 Reference standards
NII-COCH
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB2374—94 General conditions for dyeing determination GB/T2375—80 Determination of color tone and intensity of direct dyeing GB/T2381-—94 Determination of insoluble matter content in dyes GB/T2383—80 Determination of sieving fineness of dyes GB/T2386—80 Determination of moisture content in dyes and dye intermediates GB3920—83 Test method for color fastness of textiles to rubbing 3 Test method for color fastness of textiles to washing
GB3921—83
GB3922—83 Test method for color fastness of textiles to perspiration GB/T5713—85 Test method for color fastness of textiles to water Test method for color fastness of textiles to hot pressing (ironing) GB6152—85
Test method for color fastness of textiles to light Xenon arc test GB8427—87
3 Requirements
3.1 Appearance: purple-red uniform powder.
3.2 The quality index of Direct Red B shall comply with the provisions of Table 1. Approved by the Ministry of Chemical Industry of the People's Republic of China on April 8, 1996 and implemented on January 1, 1997
Wbzsoso, cO Items
Color light (with standard product)
Intensity (for standard product), points
Content of impurities insoluble in water, %
Moisture content, %
Fineness (content of residues passing through 250μm sieve), %3.3
HG/T2748-1996
Quality index
The color fastness of dyeing on cotton fabrics shall not be lower than that specified in Table 2. Table 2 Color fastness of dyeing
1/1Standard dyeing depth is equivalent to 0.7% (owf). 4 Sampling
Sweat resistance
Approximately~slightly
Hot pressing resistance
200℃
Friction resistance
Sampling is done in batches. The manufacturer takes the products mixed evenly at one time as a batch. The number of sampling barrels for each batch shall not be less than √N/2 (N is the number of barrels for each batch of products), and the number of small batch sampling shall not be less than 3 barrels. The packaging of the sampled products must be intact. When sampling, do not allow foreign impurities to fall into the product. Use a probe to sample from the upper, middle and lower parts of the barrel. The total amount of sampled products shall not be less than 200g. After the sampled products are fully mixed, they are divided into two clean and dry brown ground-mouth bottles, and labels are attached to indicate: manufacturer name, product name, batch number, sampling date, location and name of the sampler. One bottle is used for inspection, and the bottle is sealed with paraffin for future reference. 5 Test method
5.1 Determination of appearance
Visual evaluation is adopted.
5.2 Determination of dyeing shade and intensity
5.2.1 General conditions The relevant provisions of GB2374 shall be followed. 5.2.2 The dyeing depth is 1%, 5g cotton yarn is used for dyeing, and the bath ratio is 1:40. 5.2.3 The dye solution is prepared according to the provisions of neutral dye solution in GB/T2375. The dye bath is prepared in five 300mL dye vats according to the provisions of Table 3:
W.bzsoso,cOn Dye vat number
0.5g/500mL standard sample solution
0.5g/500mL sample solution
100g/L anhydrous sodium sulfate solution
Add water to the total volume
HG/T2748—1996
Table 3 Dye bath preparation
5.2.4 The dyeing operation is carried out according to the relevant provisions in GB/T2375. 5.2.5 The color light and intensity are evaluated according to the relevant provisions in GB2374. 5.3 Determination of water-insoluble impurities
Perform according to the provisions of GB/T2381.
5.4 Determination of moisture content
Perform according to the provisions of Chapter 2 of GB/T2386. 5.5 Determination of fineness
Perform according to the provisions of GB/T2383.
5.6 Determination of color fastness to dyeing on cotton fabrics The determination of color fastness to rubbing shall be carried out in accordance with the provisions of GB3920. 3
The determination of color fastness to washing shall be carried out in accordance with the provisions of GB3921, using the formulation of test solution 1 and the conditions of method 4. The determination of color fastness to perspiration shall be carried out in accordance with the provisions of GB3922. The determination of color fastness to water shall be carried out in accordance with the provisions of GB/T5713. The determination of color fastness to hot pressing shall be carried out in accordance with the provisions of GB6152, dry pressing at 200℃. The determination of color fastness to light shall be carried out in accordance with the provisions of GB8427. 6 Inspection planning
6.1 Inspection classification
3.1 and 3.2 in this standard are factory inspection items. mL
3.13.3 in this standard are type inspection items. When encountering one of the six situations described in 6.1.1 of GB1.3, a secondary type inspection shall be carried out. In normal continuous production, the inspection shall be carried out once a year. 6.2 Factory inspection
Direct Red B shall be inspected by the quality inspection department of the manufacturer. The manufacturer shall ensure that all Direct Red B shipped out of the factory meet the requirements of this standard. Each batch of Direct Red B shipped out of the factory shall be accompanied by a quality certificate in a certain format. If one of the indicators in the inspection results does not meet the requirements of this standard, samples shall be taken from twice the amount of packaging for re-inspection. If the results of the re-inspection are even if only one indicator does not meet the requirements of this standard, the entire batch of products shall be regarded as unqualified products. 6.3 User Acceptance
The user unit has the right to accept the received Direct Red B in accordance with the provisions of this standard and check whether it meets the requirements of this standard.
7 Marking, packaging, transportation and storage
7.1 The packaging barrel should be painted with a firm and clear mark, indicating: manufacturer name, factory address, product name, registered trademark, standard number, product batch number, production date, gross weight and net weight. 3
W.bzsoso.cOmHG/T27481996
7.2 Each batch of Direct Red B shipped from the factory should be accompanied by a quality certificate in a certain format, including: manufacturer name, factory address, product name, batch number, specifications, net weight, proof that the product quality meets the requirements of this standard and this standard number. 7.3 Direct Red B is packed in iron barrels or cardboard barrels lined with plastic bags, with a net weight of 35kg per barrel. Other packaging can be negotiated with the user. 7.4 Direct Red B should be stored in a cool, dry and ventilated place to prevent heat and moisture. Avoid inversion and collision during transportation. W.
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