Colour fastness
Colour fastness is a term—used in the
The term is usually used in the context of clothes. In general, clothing should be tested for colour fastness before using bleach or other cleaning products.[3]
Lightfastness, wash fastness, and rub fastness are the main forms of colour fastness that are standardized. The light fastness of textile dye is categorized from one to eight and the wash fastness from one to five, with a higher number indicating better fastness.[4]
Washing fastness
The term washing fastness of textiles pertains to the capacity of textile materials, such as fabrics or garments, to maintain their original colour and appearance after undergoing multiple washing and laundering processes. It signifies the textile's ability to endure repeated washing without experiencing fading, bleeding, or other undesirable alterations. The washing fastness of the dyed material is determined by factors such as the solubility and rate of dye desorption from the textile material into soap, detergent, or different alkaline conditions.[5][6]
Light fastness
Lightfastness is a characteristic of a colourant, such as dye or pigment, which denotes its ability to resist fading when subjected to light exposure.[7]
Dye and the binding forces
A
Pigments as an exception do not bind chemically with textile materials.[9]
Importance of colour fastness
Colour is an influential element of fashion and clothing aesthetics; it has great value for both the user and the brand. Colour is one of the most significant features in attracting customers to buy a product or garment, and retaining of the original colour is one of the important quality parameters of coloured textiles. Colour fastness is rated poor if the item does not comply with tests exposing it to washing, light, rubbing and other agents such as perspiration.[10][11]
Test methods for colour fastness
Fading, change in colour, and staining of adjacent textile materials were[when?] common complaints of poor quality materials. Standardized testing for colour fastness and other parameters was established in the 20th century by industrialized economies such as the US, the UK, Japan, and Europe. The American Association of Textile Chemists and Colorists (AATCC), International Organization for Standardization (ISO) and Society of Dyers and Colourists played vital roles in establishing the test methods.[12]
There are various tests and testing methods according to the physical and functional requirements of the product. For example, fastness to saliva may be important for
References
- ^ JSTOR 43426623.
- ISBN 978-0-901956-78-1.
- ^ "Colorfastness". Archived from the original on December 20, 2016. Retrieved December 1, 2011.
- JSTOR 1506527.
- ISBN 978-1-57808-404-3.
- ^ various (1978). Dictionary of Fiber & Textile Technology. Internet Archive. Hoechst Celanese. p. 16.
- ^ "Learn How to Understand the Label on a Tube of Paint". LiveAbout. Retrieved 2023-08-06.
- ^ "Proposed Rules". Federal Register. 59 (245): 66080. 19 December 1994.
Dyes are intensely colored or fluorescent organic substances that impart color to a substrate by selective absorption of ... mechanical retention, or by the formation of ionic or covalent chemical bonds.
Dyes are used to color fabrics - ISBN 9781842173305.
- ^ Rutnagur, Sorabji M. (2004). "The Indian Textile Journal - Volume 114". The Indian Textile Journal. 114: 7–12.
- ^ "Color Fastness: Colour Fastness to Washing" (PDF). i-merino. 2011-10-11. Archived from the original (PDF) on 2011-10-11. Retrieved 2020-10-07 – via Wayback Machine.
- ISBN 9780081018859.)
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