Chlorine and Non-Chlorine Bleach Test for Textile Colour Fastness Evaluation
A Chlorine and Non-Chlorine Bleach Test is a standardized textile evaluation method used to measure how well a dyed or printed fabric retains its colour when exposed to bleaching agents commonly used in household and commercial laundering. This test determines colour fastness by exposing fabric samples to chlorine-based bleach (such as sodium hypochlorite) and non-chlorine or oxygen-based bleach (such as hydrogen peroxide or sodium percarbonate) under controlled conditions, then assessing colour change and staining using standard grey scales.
We offer various standard lamps from Philips/GE/Macbeth/verivide for color matching in textiles like fibre/yarn/fabric/garment and any kind of garment accessories.These lamps meet CIE specifications and offer lux levels and CRI index as per standards.
Lamps offered are :
D75: A bluish colored light source originally used for grading cotton & their evaluation applications. It offers 7500K.
D65: A light bluish colored light source used in color matching applications of paints,textiles,raw inks and other manufactured products. It offers 6500K.
D50: A near white light source used in the evaluation of graphic arts and imaging applications. It offers 5000K.
Ultra violet: Light energy not normally visible to human eye, but which is present in natural daylight.
Cool White Fluorescent (CWF) – A wide band single phosphor fluorescent source commonly used in commercial lighting applications . It is characterized by emitting high amounts of green energy, with a color temperature of approximately 4100K. It has a CRI or approximately 62.
TL84 – A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications . It is characterized by emitting high amounts of green energy, with a color temperature of approximately 4100K. It has a CRI of approximately 86.
TL830 – A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications . It is characterized by emitting high amounts of yellowish red energy, with a color temperature of approximately 3000K. It has a CRI of approximately 86.
Ultralume 30 (U30 or 30U) – A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications . It is characterized by emitting high amounts of yellowish red energy with a color temperature of approximately 3000K. It has a CRI of approximately 85.
Ultralume 35 (U35 or 35U) – A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications . It is characterized by emitting high amounts of reddish yellow energy with a color temperature of approximately 3500K. It has a CRI of approximately 85.
Illuminant A – is a standardized illuminant described in the international standard, CIE Publication 15.2 and specified for use in color matching applications in ASTM D1729-96.It offers 2865 K
Horizon – Reddish in color source described in older specification and used for color matching applications.It offers 2300K.
Textile manufacturers, dyeing units, apparel exporters, and quality control laboratories perform this test to validate colourfastness claims, meet buyer compliance requirements, and support product labelling accuracy. It applies to woven and knitted fabrics, garments, home textiles, and workwear across cotton, polyester, and blended fabrics.
Amith Garment Services supports this testing with calibrated equipment, standard-compliant methodology, and dependable results trusted by testing laboratories across India. Contact Amith Garment Services to strengthen your fabric quality assurance process.
Frequently Asked Questions
A Chlorine and Non-Chlorine Bleach Test evaluates how fabric colour reacts when exposed to chlorine-based and oxygen-based bleaching agents during laundering. It helps textile manufacturers and laboratories verify colour fastness, ensuring dyed fabrics resist fading, yellowing, and staining after repeated washing with household or commercial bleach products.
Bleach fastness testing helps garment exporters meet international buyer quality standards and compliance requirements. It confirms that fabrics retain their colour after exposure to bleaching agents commonly used in overseas laundering, reducing the risk of rejected shipments, customer complaints, and costly product returns.
Bleach fastness testing is generally performed according to AATCC and ISO colour fastness standards. These methods specify bleach concentration, temperature, exposure time, washing conditions, and grey scale evaluation to ensure accurate, repeatable, and internationally accepted test results.
A chlorine bleach test determines how fabric colour changes after exposure to chlorine-based bleach used during laundering. It helps manufacturers evaluate whether dyed fabrics will fade, discolour, or lose colour strength, making it an essential quality control test for textile and garment production.
Non-chlorine bleach testing uses oxygen-based bleaching agents, which provide a milder oxidation process than chlorine bleach. Since fabrics can react differently to each bleaching method, both tests are often performed together to provide a complete assessment of bleach colour fastness.
Textile laboratories perform bleach fastness testing to ensure fabric colours remain stable after bleach exposure during real-world laundering. The test supports buyer compliance, protects brand reputation, improves product quality, and ensures garments maintain their appearance throughout their expected service life.