What is ISO 105 a02?
Describes the grey scale for determining changes in colour of textiles in colour fastness tests, and its use. The essential scale (5 steps) consists of pairs of non-glossy grey colour chips (or swatches of grey cloth).
How to do grey scale test?
A tool, known as a grey scale, is used to visually assess and compare the loss of colour of a specimen by identifying a half-step rating of 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1. The half-step scale consists of pairings of grey colour swatches, from 5 being good to 1 being poor.
What is gray scale rating?
​Grey Scales (Gray Scales) are used for assessing colour change and staining during colour fastness testing. Both scales are used for visual assessment to enable you to specify a rating from 1 to 5, with 5 being ‘good’ and 1 being ‘poor’.
What is grey scale in textile?
Both scales measure color-fastness of textile dyes. Gray Scale for color change indicates the amount of fading or color alteration with environmental exposure or washing, and gray scale for staining indicates the amount of staining of adjacent materials that occurs with washing of a specimen.
What is colour fastness to washing?
The resistance of colour of textiles to fade or bleed against different agencies such as light, wash,water, perspiration, rubbing, acid, alkali,hot pressing, bleaching etc. is called colour fastness.
How is color fastness measured?
The colour fastness following exposure to light of a material is defined as the level of change in colour it undergoes when exposed to light (ISO 105 B02:1994). This is measured using a specimen of the fabric to be tested.
What is blue scale in textile?
The blue scale is a standard comparative scale from 1 to 8 (1=very poor, 8=excellent) which is used for assessing the light fastness of printed or dyed fabrics and textiles (1 = very poor, 8 = excellent).
What is pill in textile?
A pill, colloquially known as a bobble, fuzzball, or lint ball is a small ball of fibers that forms on a piece of cloth. Pilling is a surface defect of textiles caused by wear, and is generally considered an undesirable trait.
How can you tell if fabric is bleeding?
Blot the area with a white paper towel. If the color comes off onto the white paper towel, the fabric will bleed dye. If the color of the test area has changed or become lighter, the dye will bleed.