GB/T 41610-2022 English PDF (GBT41610-2022)

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GB/T 41610-2022: Textiles - Test for colour fastness - Colour fastness to breast milk
GB/T 41610-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
CCS W 04
Textiles - Test for colour fastness - Colour fastness to breast
milk
ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Principles ... 5
5 Equipment ... 5
6 Reagents and materials ... 6
7 Samples ... 7
8 Operating procedures ... 8
9 Test report ... 9
Textiles - Test for colour fastness - Colour fastness to breast
milk
1 Scope
This document describes a test method for determining the colour fastness of textiles to
artificial breast milk.
This document applies to various textile products.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in
colour
GB/T 251 Textiles - Tests for colour fastness - Grey scale for assessing staining
GB/T 6151 Textiles - Tests for colour fastness - General principles of testing
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 7568.1 Textiles - Tests for colour fastness - Specification for wool adjacent
fabric
GB/T 7568.2 Textiles - Tests for colour fastness - Standard adjacent fabrics - Part 2:
Cotton and viscose
GB/T 7568.3 Textiles - Tests for colour fastness - Standard adjacent fabrics - Part 3:
Polyamide
GB/T 7568.4 Textiles - Tests for colour fastness - Specification for polyester adjacent
fabric
GB/T 7568.5 Textiles - Tests for colour fastness - Specification for acrylic adjacent
fabric
If the size of the combined sample is not (40±2) mm × (100±2) mm, the nominal
pressure applied by the selected heavy hammer to the sample shall be (12.5±0.9) kPa.
Other devices that achieve the same results can be used.
5.2 Incubator: It can keep the temperature at (37±2) ℃.
5.3 Balance: It shall be accurate to 0.001 g.
5.4 Mechanical stirrer: The minimum speed shall be 1000 r/min.
5.5 Heating device: It can maintain the temperature at (37±2) ℃, such as a water bath.
5.6 Corrosion-resistant flat-bottom containers.
5.7 A set of 11 glass or acrylic plates.
5.8 Grey scale for evaluating discoloration: It shall be in accordance with the provisions
of GB/T 250.
5.9 Grey scale for evaluating staining: It shall be in accordance with the provisions of
GB/T 251.
5.10 Spectrophotometer for evaluating discoloration and staining: It shall comply with
the provisions of GB/T 32598 and GB/T 32616.
6 Reagents and materials
6.1 Artificial breast milk test solution
The reagents used shall be chemically pure and prepared just before use. The
proportions of components in the artificial breast milk test solution are as follows:
Whey Protein Powder (CAS No.: 84082-51-9) 1.0 g
Oleic acid (CAS number: 112-80-1, density 0.89 g/mL) 3.0 g (3.4 mL)
Lactose (CAS No: 63-42-3) 7.5 g
Grade III water (meets the requirements of GB/T 6682) 85.0 g
Potassium chloride 0.10 g
Calcium chloride 0.07 g
Sodium chloride 0.03 g
When preparing the artificial breast milk test solution, in order to fully dissolve the
substances, it is advisable to use a mechanical stirrer (5.4) and a heating device (5.5) to
heat the solution [the temperature should be (37±2) °C] then to accelerate the
dissolution.
the other half and exchange their positions before placing them on the reverse
side of the sample; then, sew them along two short edges. If one sample cannot
contain all the colors, multiple combined samples shall be taken to contain all the
colors. For fabrics with different colors on both sides or with film on one side,
refer to printed fabrics to process adjacent fabrics.
7.2 For the yarn or loose fiber sample, the mass of the yarn or loose fiber shall be
approximately equal to half of the total mass of the adjacent fabric; prepare a combined
sample according to one of the following methods.
a) Sandwich the sample between a piece of (100±2) mm × (40±2) mm multi-fiber
adjacent fabric and a piece of (100±2) mm × (40±2) mm fabric that is difficult to
dye (6.2.3), and sew them along the four sides (according to the provisions of
GB/T 6151) to form a combined sample.
b) Sandwich the sample between two pieces of (100±2) mm × (40±2) mm specified
single-fiber adjacent fabrics, and sew them along the four sides to form a
combined sample.
8 Operating procedures
8.1 Use a balance (5.3) to measure the mass of a prepared combined sample (see 7.1),
and the unit shall be gram, in order to make the liquor ratio accurate. Place the weighed
combined sample flat in a corrosion-resistant flat-bottom container (5.6), and inject the
artificial breast milk test solution to make it completely wet; the bath ratio shall be 50:1.
Keep the combined sample at room temperature (25±5) ℃ for 30 min, press and move
it from time to time to ensure that the test solution penetrates into the sample fully and
evenly. When the standing time is reached, remove the sample from the test solution,
and use a suitable method (such as two glass rods) to squeeze out the excess test solution
on the combined sample.
Place the combined sample flat between two glass or acrylic resin plates (5.7), put it in
the test device (5.1) that has been preheated to the test temperature, and make it be
subjected to a nominal pressure of (12.5±0.9) kPa.
Note: Each test device can support up to 10 combined samples for testing at the same time, and each
sample is separated by a plate (11 plates in total). If there are less than 10 samples, 11 plates shall be still
used to keep the nominal pressure unchanged.
8.2 Put the test device (5.1) with the combined sample into the incubator (5.2), and keep
it at (37±2) °C for 4 hours; place the combined sample horizontally (Figure 1) or
vertically (Figure 2) according to the type of the test device.