Textile color fastness test analysis

Color fastness, also known as color fastness and color fastness, refers to the resistance of the color of textiles to various effects during processing and use. The fastness rating is based on the discoloration of the sample and the staining of the undyed backing fabric. Textile color fastness testing is a routine testing item in the intrinsic quality testing of textiles. Textile color fastness tester is a test instrument for textile color fastness evaluation. Textiles will be subjected to various external effects such as light, washing, ironing, perspiration, friction and chemicals during their use. Some printed and dyed textiles are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand washing, grinding. wool, etc., which requires the color and luster of printed and dyed textiles to maintain a certain fastness. Good or bad color fastness is directly related to the health and safety of the human body. In the process of wearing a product with poor color fastness, when it encounters rain and sweat, the pigment on the fabric will fall off and fade, and the molecules of the dye and heavy metal ions are all It may be absorbed by the human body through the skin and endanger the health of the human skin. On the other hand, it will also affect other clothing worn on the body to be stained, or to stain other clothing when washed with other clothing. Color fastness (referred to as color fastness) refers to the use or processing of dyed fabrics, which are subjected to external factors (extrusion, friction, washing, rain, exposure, light, seawater immersion, saliva immersion, water stains, sweat stains, etc. The degree of fading under the action of (etc.) is an important indicator of the fabric. Because the conditions of fabrics in the process of processing and use are very different and the requirements are different, most of the current test methods are simulated tests or comprehensive tests according to the environment and conditions of the action. The content is quite extensive. However, looking at the standards of the Standards Organization (ISO), the American Association of Dyers and Chemists (AATCC), Japan (JIS), the United Kingdom (BS) and many other standards, the commonly used standards are wash resistance, light resistance, friction resistance, sweat resistance, and ironing resistance. , Weather resistance, etc. In actual work, the test items are mainly determined according to the use of the product and product standards. For example, the wool textile product standard stipulates that the color fastness to sunlight must be tested. Of course, the knitted underwear must be tested for perspiration fastness. Outdoor textiles (such as parasols, light box cloth, canopy materials), of course, its color fastness to weather should be tested. Corresponding standards: Colour fastness to washing ISO 105 C06: 1994/Cor.2:2002(E): Tests for colour fastness of textiles Part C06: Colour fastness to domestic and commercial laundering BS EN ISO 105-C06: 1997: Textiles Tests for colour fastness Part C06: Colour fastness to domestic and commercial laundering Colour fastness to dry cleaning ISO 105 D01:1993/BS EN ISO 105 D01: 1995: Colour fastness to textiles Colour fastness to dry cleaning ISO 105 E01 : 1994/Cor.1:2002(E): Tests for colour fastness of textiles – Colour fastness to water ISO 105 E02: 1994/Cor.1:2002(E): Tests for colour fastness of textiles – Colour fastness to sea water Colour fastness to perspiration ISO 105 E04: 1994/Cor.1:2002(E) : Test method for colour fastness of textiles to perspiration Colour fastness to dry heat ISO 105 P01: 1993: Colour fastness of textiles Colour fastness to rubbing (except for pressing) BS EN ISO 105-P01: 1995: Colour fastness of textiles to dry heat (except hot pressing) Colour fastness to rubbing BS1006 X12: 1990: Colour fastness of textiles to rubbing EN ISO105 X12:2002: Color fastness test of textiles Color fastness to rubbing Color fastness to heat and pressure BS EN ISO 105 X11: 1996: Color fastness test of textiles Color fastness to heat and pressure light color fastness GB/T8427-1998 Color fastness test of textiles to artificial light: 1. Light fastness: Light fastness refers to the degree to which colored fabrics are discolored by sunlight. The test method is to compare the fading degree of the sample after simulating sunlight exposure with the standard color sample, and it is divided into 8 grades, 8 grades are grades, and 1 grades are poor. Fabrics with poor light fastness should not be exposed to the sun for a long time, and should be dried in a ventilated place. 2. Washing fastness: Washing or soaping fastness refers to the degree of color change of dyed fabrics after washing with washing liquid. The gray grading sample card is usually used as the evaluation standard, that is, the evaluation is based on the color difference between the original sample and the faded sample. The washing fastness is divided into 5 grades, 5 grades and 1 grades. Fabrics with poor washing fastness should be dry cleaned. If wet cleaning is carried out, more attention should be paid to the washing conditions, such as the washing temperature should not be too high, and the washing time should not be too long. 3. Fastness to rubbing: Fastness to rubbing refers to the degree of color fading of dyed fabrics after rubbing, which can be dry rubbing and wet rubbing. The rubbing fastness is based on the degree of staining of white cloth as the evaluation principle, which is divided into 5 grades.Indicates that the rubbing fastness is better. 4. Fastness to perspiration: Fastness to perspiration refers to the degree of color fading of dyed fabrics after they are soaked in sweat. 5. Ironing fastness: refers to the degree of discoloration or fading of dyed fabrics during ironing. 6. Sublimation fastness: refers to the degree of sublimation of dyed fabrics in storage. The dyeing fastness of normal fabrics generally requires grades 3-4 to meet the needs of wearing. 》》More about textile testing: https://www.baijiantest.com/

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