Both scales measure color-fastness of textile dyes. It is determined by an experiment called color fastness to light. ← Older Post Standards and Testing for Colour Fastness of Textiles, Share and leave your email above to receive standards for free, Please prove you are human by selecting the. Traditionally this test was developed for the textile industry, but it was later adopted by the printing industry as … As a result of UV light, the substrate material supplies hydrogen to the colourant molecules, reducing the colorant molecule. This system of rating is a bit confusing for customers, and even for manufacturers,  so fabric industry is switching to a 1 year, 3 year, or 5 year fade warranty to avoid confusion. Following step is maintained during measure the color fatness to light. Besides the abrasion resistance (topic in edition no. LIGHT FASTNESS: When conducting this test, the upholstery fabric is exposed to artificial lighting for a longer period of time (approx. Colour fastness of textiles is an important index for evaluating the quality of dyed and printed textiles, and it is also one of the quality problems that consumers care about and complain about. The industry standard for indoor upholstery fabric is 40 hours of lightfastness. This subjective evaluation method is susceptible to the influence of external conditions and the psychological activities of the experimenters themselves, resulting in inconsistent rating results. In order to determine the lightfastness of a print, the samples - together with the socalled Blue Wool Scale - are exposed in an ATLAS „Suntester CPS“ or similar appropriate equipment to standard xenon light. Revolution Performance Fabrics is pleased to announce our official outdoor fabric line! [4][5], Light encountering a painted surface can either alter or break the chemical bonds of the pigment, causing the colors to bleach or change in a process known as photodegradation. For example, if the lightfastness of the colourant is indicated to be 5 on the Blue Wool scale, it can be expected to fade by a similar amount as the strip number 5 in the Blue Wool test strip set. The industry standard for indoor upholstery fabric is 40 hours of lightfastness. There are many testing items for colour fastness, and the main items frequently checked in technical specifications or product standards are as follows: AATCC 61, ISO105-C01, GB/T 5713  colour fastness to water, AATCC 15, ISO 105-E04, GB/T 3922  colour fastness to perspiration, AATCC 8, ISO 105X12, GB/T 3920 colour fastness to rubbing, DIN 53160, GB/T 18886  colour fastness saliva, ISO 105-D01, GB/T 5711  colour fastness to dry cleaning, AATCC 16, ISO 105-B02, GB/T 8427  colour fastness to light, AATCC 23, ISO 105-G02  colour fastness burnt-gas fumes, AATCC 106, ISO 105 E02, GB/T 5714  colour fastness to sea water, AATCC 92, ISO 105, GB/T 5718  colour fastness to ironing and sublimation. It is an important index of fabrics. The high energy of ultraviolet radiation in particular accelerates the fading of the dye. After completing the test, sample is compared with the blue scale. Other fabric manufacturers do this by spraying their fabric with the typical C6 compound that will “guard” and “resist” stains. Typically, it is hard to calculate to the number of direct sunlight hours your furniture will receive, so most companies are moving away from the typical lightfastness hours rating and offering 1-year, 3-year, or 5-year limited warranty on their fabric. As the hydrogen is removed, the material undergoes oxidation. Concept of Tearing Strength Local yarns in fabrics tear in residual rent due to concentrated…, Are you looking for insightful, practical and useful textile blogs and forums? Testing is typically done by controlled exposure to sunlight, or to artificial light generated by a xenon arc lamp. [8] Black colourants are usually considered the most lightfast. AATCC 92, ISO 105, GB/T 5718 colour fastness to ironing and sublimation. The quality of colour fastness of textiles is not unfamiliar to most consumers, for example, black jeans turn grey after being washed twice, new socks dye your soles, white bottom shirts are “polluted” by dark sweaters, and silk dresses become colourless after being washed only once.