This standard is an equivalent adoption of ISO 105/E04 - 1994 Textiles -- Tests for color fastness -- Part E04: Color fastness to perspiration which is appropriately modified and supplemented.
1 Subject content and application scope
This national standard specifies a textile color fastness to perspiration test method.
This standard is applicable to different kinds of textile color fastness to perspiration experimentations.
2 Quoted standards
GB 250 Gray scale for assessing change in color
GB 251 Gray scale for assessing staining
GB 6151 Textiles-Tests for color fastness-General principle of testing
GB 7546 - 7568 Textiles--Tests for color fastness--Specification for silk adjacent fabric
GB 11404 Textiles-Tests for color fastness-Specification for standard adjacent fabric: Multifibre
3 Principle
Put the textile sample and stipulated accompanying fabric into the two test solutions with histidine. Then remove the test solution and put them between tablets with authorized pressure. Dry the sample and accompanying fabric respectively.
Use the grey scale to assess change color and staining of the sample and accompanying fabric.
4 Apparatus and reagents
4.1 Test equipment: one stainless steel rack; a set of heavy punch ( include spring bearer plate) with the weight of 5kg and floor area of 11.5cm×6cm; 11.5cm×6cm glass plate with the thickness of 0.15cm; put the 10cm×4cm composite sample of acrylic resin board between the boards. Instrument structure shall guarantee the sample pressure is 12.5kPa [see Annex B (reference)].
4.2 Oven: 37±2 ℃; Without the ventilation device.
4.3 Agent
a. L-Histidine HCL—hydrate (C6H9O2N3·HCl·H2O);
b. NaCl, Chemically pure;
c. Disodium hydrogen phosphate + dihydrate (Na2HPO4·12H2O) or disodium hydrogen phosphate + dihydrate (Na2HPO4·2H2O), chemically pure;
d. Sodium dihydrogen phosphate dehydrate (NaH2PO4·2H2O), chemically pure;
e. Sodium hydroxide (Noah), chemically pure.
4.4 Accompanying fabric: each composite sample requires two blocks with the dimension of 10cm×4cm; the first one is made of the same sample of allied fiber; the second is made of the stipulated fiber in the table below. If the sample is mixed spinning or interweaved, then the first is made of material of fiber; the second containing the secondary fiber.
First piece of accompanying fabric Second piece of accompanying fabric First accompanying fabric Second piece of accompanying fabric
Cotton
Wool
Silk
Flax
Rayon Wool
Cotton
cotton
Wool
Wool Cellulore
Polyamide fiber
Polyester fiber
Polyacrylonitrile fiber Rayon
Wool or rayon
Wool or cotton
Wool or cotton
Or use a piece of multifilament accompanying fabric.
4.5 Grey scale for assessing the change color and staining
5 Sample
5.1 If the sample is texture, take a 10cm×4cm piece and put it between two pieces of accompanying fabric (see 4- 4); to joint with another piece of multifilament accompanying fabric and be switched on one side to form a composite sample. The overall experimentation needs two composite samples.
During printing texture experimentation, contact the front with one half of the accompanying fabric; cut the rest half and out it cross on the back; then stitch two short sides. Or joint it with a piece of multifilament accompanying fabric and stitch the short side. If all colors cannot be included, use more composite sample.
5.2 Where yarn or loose fiber is to be tested, take a mass of the yarn or loose fiber approximately equal to one half of the combined mass of the adjacent fabrics, and either: place it between two pieces monofibre fabric, or place it between a 10cm x 4cm piece of multifibre fabric and a 10cm x 4cm piece of the non-dyeable fabric and sew them along all four sides. This test needs two groups of samples.
6 Test solution preparation
Use the distilled water to prepare the test solution; do not prepare it if do not use.
Each litre of alkali liquor contains:
L-Histidine HCL—hydrate (C6H6O2N2·HCl·H2O) 0.5g
Sodium chloride (NaCl) 5g
Disodium hydrogen phosphate + dihydrate (Na2HPO4·12H2O) 5g or
Or disodium hydrogen phosphate + dihydrate (Na2HPO4·2H2O) 2.5g
Use (NaOH) =0.1mol/LSODA-LYE to adjust test solution pH value to 8
Each liter of acid liquor contains:
L-Histidine HCL monohydrate (C6H9O2N3·HCl·H2O) 0.5g
Sodium chloride (NaCl) 5g
Sodium dihydrogen phosphate dihydrate (NaH2PO4·2H2O) 2.2g
Use (NaOH) =0.1mol/LSODA-LYE to adjust test solution pH value to 5.5
7 Procedure
7.1 Weigh each composite specimen. Lay out a composite specimen smooth in a flat-bottomed dish and cover with alkaline solution. Thoroughly wet the composite specimen in this solution at pH 8 (± 0,2) at a liquor ratio of 50:1, and allow it to remain in the solution at room temperature for 30 min. Press and move it from time to time to ensure good and uniform penetration of the liquor. Pour off the solution and wipe the excess liquor off the specimen between two glass rods. Weigh the composite specimen again to ensure that it weighs 2 to 2.5 times its original weight.
Place the composite specimen between two glass or acrylic-resin plates, under a pressure of 12,5 kPa, and place in the test device which has been preheated to the test temperature.
7.2 Place the test devices containing the composite specimens in the oven (4.2) for 4 h at (37 ± 2) °C, positioning them so that the test specimens are in the vertical position.
7.3 Open out each composite specimen (by breaking the stitching except on one of the shorter sides, if necessary) and dry it by hanging it in air at a temperature not exceeding 60 °C, with the two or three parts in contact only at the line of stitching.
7.4 Assess the change in color of each specimen and the staining of the adjacent fabric(s) by comparison with the grey scales
8 Test report
Make the report on sample change color in acid and alkali test solution, staining progression of each accompanying fabric.
Annex A
Perspiration quick test
(Reference)
A1 This method is applicable for color fastness to perspiration experimentation. As a GB/T 3922 standard method, it is not an arbitration test method.
A2 Equipment and material requirements same to chapter 4, 5 and 6. Oven shall be able to sustain the temperature at 70±2℃.
A3 Operation
Heating up oven to 70±2℃; heat up the perspiration test apparatus too.
Put the soaked composite sample on the clamps; scrape off superfluous liquid; put on the clamps; put the spring bearer plate on it; loosen projection screw when the heavy punch is applied; make the sample to bear 12.5kPa pressure; tighten up projection screw and remove movement weight mass; process it at 70℃ for 60min.
A4 Report
Make the assessment on sample change color and accompanying fabric staining in the acid and alkali solution; choose the most severe samples and make the report.
