This standard specifies the method for determining the color fastness to perspiration of leather. This standard applies to all leathers in all processing stages, especially to garment leather, glove leather and lining leather, and also to unlined upper leather. QB/T 2464.23-1999 Method for determining the color fastness to perspiration of leather QB/T2464.23-1999 Standard download decompression password: www.bzxz.net

Classification number Y45
Accumulation number 4248-1999
Light Industry Standard of the People's Republic of China
QB/T 2464.23-99
eqv 1s0 11641:1993
Issued on October 14, 1999
Determination method of color fastness to perspiration
Implementation on March 1, 2000
Issued by the State Bureau of Light Industry
QB/T 2464.23S
This standard is equivalent to the international standard JSO11641:1993 & Leatler-Tost Eorcolourfastness-Colaurfastnesstopersndration. This method is to test the effect of artificial sweat solution on human sweat. During the test, the color of the product may change, and the fabric may be stained. In general, human sweat is weakly acidic, and then dust can cause it to change. The pH range is weakly volatile (pH 7.5~8.5). The effect of degradable sweat on the skin is weaker than that of normal sweat. Therefore, degradable sweat is usually used instead of acidic solution to simulate the state often encountered in practice. Because the sweat of various people is different, it is impossible to design a nearly effective method. Therefore, the degradable human sweat filter specified in this standard is consistent with the human multi-effect whitening solution. Appendix A of the 1S011641:1993 international standard recommends the supply of equipment and materials used in this test method standard: Appendix B specifies the names of the IF standards related to this standard, which are referenced in this standard. This standard is proposed by the National Bureau of Light Industry. This standard is under the jurisdiction of the National Fur Standardization Center. The China Leather Research Institute was responsible for drafting this standard. The authors of this standard are: Zhao Liguo, Bing Yi, Ji Ying. ISO Foreword ISO (International Organization for Standardization) is a standardization organization composed of standardization organizations (ISO members) from all over the world! The formulation of international standards must be approved by ISO technical committees. Any member has the right to make comments on the standard drafts published by the technical committee. International organizations, governmental organizations, and non-governmental organizations related to ISO may participate in relevant cooperation. ISO and the International Electrical and Electronics Commission (EC) have a close cooperation in international industrial standardization work. The technical committees wish to thank all members! This International Standard is developed through voting by the member organizations. Proposals that reach a 75% approval rate or above will be published as international standards. International Standard 1S011641 was developed by the Union of International and Standard Chemists' Committee on Temperature Testing (IULTCS) and is published as IL:F426, J.Soc.LeaherTechlL, Chel, 71: Pp22-24 (1987): October 1989. It was published by ULF as Appendix A and Appendix D for reference only. W Light Industry Standard of the People's Republic of China
Method for determination of color fastness to perspiration of leather
1 Scope
This standard specifies the method for determination of color fastness to perspiration of leather QB/T2464.23-95
eqy15011641:1993
This standard is applicable to all leathers in various processing sections, especially to clothing leather, namely, lining sections, and is not applicable to unlined uppers. 2. Referenced Standards
The provisions contained in the following standards become the provisions of this standard through reference. The versions shown are valid at the time of publication of this standard. All standards will be revised. This standard will consider the possibility of the following standards and new versions: GB250-1995 Color Sample for Color Change GB251-1999 Color Sample for Color Evaluation GB6682-92 Test Method for Water-Resistant Water and Test Method B140489 Standard Test Method for Multi-Fiber Knitted Fabric OB/T3S12.2-99 Leather Single Material Disassembly Test Method Note: For the content of this standard, please refer to B4689.284. 3 Principle The leather test piece and the fabric are separately soaked in artificial sweat solution, and then the test piece is closely attached to the batch of fabrics to make a composite test piece, which is placed in the manufacturing device to maintain a certain degree of warmth and code, and the specification is retained. After the test, the test mold and the fabric are dried. The gray sample of the industry standard leather test grid changes into the color and the stain of the fabric. The leather with the layer (or without the layer) can be tested directly, or the coating can be removed and then scratched. 4 Instruments and materials
can make the combined sample maintain the average pressure F of 1.23N/cm2 [equivalent to 135g/cm2 after loading the material) 4.2 Add a single block
about the bottom, 4.5kg.
1.3 Can maintain (37+2) foaming degree.
4.4 Multi-fiber fabric
SW multi-fiber fabric in accordance with GB1404: size 100mm×36mm: Sichuan as a continuous fabric. 4.5 Sandpaper
Sandpaper with a short length of 11 grains.
Approved by the State Bureau of Light Industry on October 14, 1999
Implementation on March 1, 2000
4. 6 Air drying equipment
4.7: Vacuum pump
Q8/T 2464.23-99
Can dry the air (4.6) and create a vacuum of 5kPa (50mbar) within 4min. 4.e Distilled water or deionized water
Comply with the requirements of Grade 3 water in GB/T6682.
4.9 Artificial liquid solution
Each liter of human sweat contains the following ingredients:
Tris(methyl)amineNH,C(CH,OH)
Nitrilotriacetic acid [NLHCOOH)
Add acid (2mol) to adjust the pH to 8.0 (±0.1): Check the pH at the same time and discard the sample whose pH is not within the range of 8.0 and 0.1. For example, if there are microorganisms in the sweat, discard them.
5 Test sample
5.1 If there is no intermediate layer, or if there is a final layer but the coating is not tested, only cut the sample into a size of 100mm×36mm for testing.
5.2 If there is a transition layer in the sample, remove the intermediate layer and test it according to the above method. Cut the leather sample into 120mm×50mm size, put the coated surface on the paper (4.5) with a size of 150mmx200mm, put the paper on the surface of the leather sample, put 1kg of the material on the surface of the leather sample, and sand the sample 10mm short, for 10 times. 3: In the actual operation, the sandpaper is also called the seal, and the new rough mountain is used. The copper bottom brush is used to remove the roughness of the leather stem. The test sample is judged to be 100mm36imm. In the test report, the effect of removing the broken layer is given: 5.3: calcium six or two pyridine rats (4.4), the size is 10mm*36mm6 test steps
8. 1 Place the leather sample and the fabric in separate containers, keep them in a vacuum oven (4.6), generate a 5xPa atmosphere for 4 min and keep it for 2 min, then return to normal, repeat the process. Place one piece of fabric on a glass plate, then place the leather sample with the test side facing down, and cover it on the fabric. If both sides are to be tested, place the second piece of fabric on the leather sample and cover it on the glass plate. Heat in a (37 ± 2) °C oven (4.3) at 4.5 K for at least 1 h. The composite specimen is placed between the two glass plates in the test apparatus (4.1) and placed on the test surface at a 4.5° angle. To allow excess sweat to flow out, the hood is tilted 30°. When testing two composite specimens, be careful to ensure that each specimen is placed between the two glass plates so that the sweat is evenly applied. The hood is placed in a combustion chamber as shown in Figure 3hWQB/T2464.23-99
6.33. After the hood is kept in a combustion chamber at (37±2)℃, remove the weight and separate the composite specimen from the hood. Put the composite specimens together at an angle and dry them under the standard conditions of 0B/T3812.2 (temperature 20% and relative humidity 65%). The specimen and its clothing fabric can be connected at the joint.bZxz.net
8.4. Use the grey scale that meets the requirements of 51 to determine the degree of staining of the adjacent fabric: Use the grey scale that meets the requirements of GF250 to evaluate the change in color of the leather sample. 7. Test report
The complete report should include the following:
a) Standard:
b) Sample name, number, type, manufacturer (or trademark), production date:
c) Test the permeability of the tested leather, whether it has coating, if so, whether it has been coated:
d) Test results (value of color change of leather sample, value of staining of adjacent fabric):
f) Differences between the test method and this standard:
g) Test supervisor, second period.
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