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Textile color fastness, also known as dyeing fastness, is the ability of a fabric to resist changing its color characteristics or transferring its colorant to an adjacent material. Textile color fastness is an important quality index. Poor color fastness can cause textiles to fade or discolor, thereby destroying the beauty of clothing and damaging health. If customers feel that your product has poor performance and durability, they will lose confidence in your brand. In addition, color fastness is also an important ecological technical indicator. During the dyeing process or when the consumer is washing, the dyes and finishing agents that fall off due to poor color fastness are discharged into the river along with the wastewater, which will adversely affect the environment. Therefore, color fastness testing is very important to ensure customer satisfaction with fabric products and maintain the ecological environment.
Factors affecting color fastness are:
Alfa Chemistry's color fastness test items include, but are not limited to, following:
Color fastness standards are not a legal requirement, you can conduct product testing according to international standards for your target market.
Color Fastness Test
Color fastness to washing
Color fatness to washing means, a specimen of the textile, in contact with one or two specified adjacent fabrics, is mechanically agitated under described conditions of time and temperature in a soap solution, then rinsed and dried. The change in color of the specimen and the staining of the adjacent fabric are assessed with the grey scales.
AATCC 61 ISO 105 C06
Color fastness to rubbing/crocking
This test is designed to determine the degree of colour that may transfer from the coloured textiles to other surfaces by rubbing. Crocking means the transfer of color from one fabric onto another by rubbing.
AATCC 8 ISO 105X12 GB / T 3920
Color fastness to dry cleaning
Dry cleaning some garments especially with dyed or printed ones may change color to some extent as well as discolor the solvent used in dry cleaning.
the products labeled in the instructions that can be dry cleaned.
ISO 105-D01 GB / T 5711 AATCC 132
Color fastness to perspiration
Color fastness to perspiration refers to the ability not to fade and not to stain when dyed fabric is perspired. The garments which come into contact with the body where perspiration is heavy may suffer serious local discoloration. This test is intended to determine the resistance of color of dyed textile to the action of acidic and alkaline perspiration.
underwear, sports wear
AATCC 15 ISO 105-E04 GB / T 3922 JIS L 0848
Color fastness to water
Color fastness to water is designed to measure the resistance to water of dyed, printed, or otherwise colored textile yarns and fabrics.
AATCC 61 ISO105-E01 GB / T 5713 AATCC 107-1991
Color fastness to light
Light fastness is the degree to which a colorant resists fading due to light exposure. Different dyes have different degrees of resistance to fading by light.
the textiles exposed in the use process, such as jackets, hats, bedding, etc. Underwear products are not assessed
AATCC 16 ISO 105-B02 GB / T 8427
Color fastness to saliva
Determine the resistance of the colour of textiles regarding influence of saliva. Color fastness to saliva is usually checked for kids or infant wear only.
infant textile products
DIN 53160 GB / T 18886 ISO 20701
Color fastness to sea water
A specimen of the textile in contact with one or two specified adjacent fabrics is immersed in sodium chloride solution, drained and placed between two plates under a specified pressure in a test device. The specimen and the adjacent fabric(s) are dried. The change in colour of the specimen and the staining of the adjacent fabric(s) are assessed with the grey scales.
AATCC 106 ISO 105 E02 GB / T 5714
Color fastness to chlorinated water (swimming-pool water)
The resistance of the colour of textiles of all kinds and in all forms to the action of active chlorine in concentrations such as are used to disinfect swimming-pool water (break-point chlorination).
Color fastness to ironing and sublimation
Ironing fastness refers to the degree of discoloration or discoloration of dyed fabrics during ironing. Sublimation fastness refers to the degree of sublimation that occurs in dyed fabrics during storage. The dyeing fastness of normal fabrics generally requires level 3-4 to meet the needs of wearing.
textile products in special working occasions
AATCC 92 ISO 105 GB / T 5718
Color fastness to burnt-gas fumes
Specifies a method for determining the resistance of the colour of textiles of all kinds and in all forms, except loose fibres, to exposure to atmospheric oxides of nitrogen as derived from the combustion of chemically pure butane gas. The method may be used for rating the colour fastness of dyes by applying the dye to textiles by a specified procedure and at a specified depth of colour and testing the dyed textiles. The change in colour is assessed with the grey scale.
textile products in special working occasions
AATCC 23 ISO 105-G02
Color fastness to weathering
Fastness to weathering is a measure of the resistance to colour change which a dyed or printed textile exhibits when exposed in the open air.
outdoor textiles (such as parasols, light box cloth, canopy materials)
ISO 105-B04 ISO 105-B10
Color fastness rating
Colour fastness is assessed generally by comparing any staining of specified adjacent fabrics during the test with a set of standard 'grey scales'. A numerical grading is given on a scale of 1–5, where 1 is very poor and 5 is excellent. Generally, a grade of 4 or above is deemed acceptable for commercial use. In 1947, ISO made color sub committee. ISO also grades the fastness: For light fastness: 1~8 For other fastness: 1~5