{"id":211757,"date":"2026-03-08T09:20:01","date_gmt":"2026-03-08T10:20:01","guid":{"rendered":"https:\/\/dabedan.com\/?p=211757"},"modified":"2026-03-10T08:21:35","modified_gmt":"2026-03-10T09:21:35","slug":"en-iso-105-b022014-assessing-colour-fastness-to-light-light-fastness-in-fabrics","status":"publish","type":"post","link":"https:\/\/dabedan.com\/en\/en-iso-105-b022014-assessing-colour-fastness-to-light-light-fastness-in-fabrics\/","title":{"rendered":"EN ISO 105-B02:2014: Assessing colour fastness to light (light fastness in fabrics)"},"content":{"rendered":"

Colour fastness is a critical performance factor in textile manufacturing, especially in <\/span>contract, hospitality and public-space applications<\/b>, where fabrics are exposed to continuous light sources. Among all colour fastness properties, <\/span>light fastness<\/b> plays a decisive role in ensuring long-term aesthetic quality and functional durability.<\/span><\/p>\n

The <\/span>EN ISO 105-B02:2014<\/b> standard is the internationally recognised method for <\/span>assessing colour fastness to light in fabrics<\/b>, providing a reliable benchmark to evaluate how textiles react when exposed to artificial daylight over a defined period of time. Understanding this standard is essential for manufacturers, specifiers and buyers who demand consistent quality and compliance in professional textile projects.<\/span><\/p>\n

What is EN ISO 105-B02:2014?<\/b><\/h2>\n

EN ISO 105-B02:2014<\/span><\/a> is a test standard that defines the method for determining the resistance of textile colours to light exposure. The test simulates natural daylight using controlled artificial light sources, allowing laboratories to measure how dyes and pigments behave when exposed to prolonged illumination.<\/span><\/p>\n

This standard applies to all types of coloured textile materials, including woven, knitted and nonwoven fabrics, regardless of fibre composition or end use. In the contract and upholstery sectors, it is widely used to validate fabrics intended for environments with high light exposure such as hotels, offices, theatres and public buildings.<\/span><\/p>\n

The role of colour fastness in product quality<\/b><\/h2>\n

Colour fastness directly reflects product quality and durability. Poor colour fastness can lead to premature fading, visual inconsistency and customer dissatisfaction, even if the fabric performs well mechanically or meets fire safety requirements.<\/span><\/p>\n

In B2B textile projects, colour stability is not optional. Architects, interior designers and facility managers expect fabrics to maintain their appearance throughout their service life. Colour fastness testing ensures that chemical bonds between fibres and dyes are sufficiently stable to resist environmental stresses.<\/span><\/p>\n

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Light fastness as part of colour fastness<\/b><\/h2>\n

Light fastness is one of the most demanding colour fastness properties. Unlike washing or rubbing, light exposure is continuous, cumulative and unavoidable, especially in spaces with natural daylight or artificial lighting systems operating for extended hours.<\/span><\/p>\n

Why light fastness is critical for coloured materials?<\/b><\/h3>\n

Effects of UV and visible light<\/b><\/h4>\n

Ultraviolet and high-energy visible light break down dye molecules through photochemical reactions. Over time, this leads to colour loss and tone shifts that cannot be reversed.<\/span><\/p>\n

Fading, discolouration and degradation risks<\/b><\/h4>\n

Insufficient light fastness results in uneven fading, yellowing or greying, particularly noticeable on large textile surfaces such as curtains or upholstery panels.<\/span><\/p>\n

Typical use cases<\/b><\/h4>\n

Light fastness is crucial not only for textiles but also for coatings, prints and plastics. In fabrics, it is especially relevant for <\/span>upholstery fabrics<\/b><\/a>, <\/b>sheers<\/b><\/a>, <\/b>velvets<\/b><\/a> and decorative technical textiles<\/b> used in public environments.<\/span><\/p>\n

Light fastness requirements for fabrics<\/b><\/h2>\n

Light fastness requirements vary depending on the application. Decorative fabrics used in low-light environments may tolerate lower ratings, while contract and hospitality textiles must meet stricter performance thresholds due to continuous exposure.<\/span><\/p>\n

Fabric light fastness scale<\/b><\/h3>\n

Light fastness results are evaluated using the <\/span>blue wool scale<\/b>, which ranges from 1 (very poor) to 8 (excellent). Each level represents a known reference material with increasing resistance to fading.<\/span><\/p>\n