What is meant by colour fastness?

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 colour fastness in textile?

Color fastness is the resistance of a fabric to change in its color characteristics or to transfer its colorant(s) to adjacent materials. Color fastness issues can be caused by: Fiber type: Fibers must be compatible with their chosen dye.

What is colour fastness and its types?

Colour fastness is a term—used in the dyeing of textile materials—that characterizes a material’s colour’s resistance to fading or running. Light fastness, wash fastness, and rub fastness are the main forms of colour fastness that are standardized.

Why color fastness properties is important for fabric?

Textile fabric has many properties. Colorfastness property is one of the most important properties of them. It is a property of a colorant which allows it to retain its different characteristics despite degradation conditions such as exposure to light and dry cleaning. It is a identity for fabric.

What is another word for fastness?

In this page you can discover 25 synonyms, antonyms, idiomatic expressions, and related words for fastness, like: rapidity, speed, swiftness, lightfastness, prussian-blue, whiteness, haste, firmness, hardness, security and soundness.

Which dye has very good for washing fastness?

Metal complex type azo reactive dyes have higher light-fastness. Textile materials coloured with reactive dyes have good wash-fastness; their wash-fastness rating is about four to five. This is attributed to the very stable covalent bond that exists between the dye molecule and the cellulosic fibre.

Why is Colour fastness important?

In testing the quality of fabrics, one of the most important test is colorfastness. Colorfastness is a property of a colorant which allows it to retain its different characteristics despite coming across degrading conditions. Colorfastness tests are conducted under standard methods.

What is Colour fastness to rubbing?

1. Rubbing Color Fastness. Rubbing color fastness refers to ability to sustain original color of dyed fabrics when rubbing. Dry rubbing color fastness refers to the situation of fading and staining of dyed fabric when rubbed with standard white cloth.

What is rubbing fastness?

Rubbing fastness refers to the resistance of the color of textiles to abrasion or staining to other textiles. With the Crockmeter, the resistance of the color of textiles and textile floor coverings to abrasion and bleeding against white friction cloth is tested.

What does hastiness mean?

Definitions of hastiness. overly eager speed (and possible carelessness) synonyms: haste, hurriedness, hurry, precipitation. types: abruptness, precipitance, precipitancy, precipitateness, precipitousness, suddenness. the quality of happening with headlong haste or without warning.

What is not a natural dye?

Azo dyes are not of natural origin.

Which is the best definition of color fastness?

Or we can define color fastness like this: Color fastness refers to the resistance of color to fade or bleed of a dyed or printed textile materials to various types of influences e.g. water, light, rubbing, washing, perspiration etc. It is an important indicator to measure the quality of dyeing products.

What do you mean by washing fastness of fabric?

Washing or soaping fastness refers to the degree of the color change of dyed fabric after washing with a washing liquid. Usually, a gray graded sample card is used as the evaluation standard; that is, the color difference between the original sample and the faded sample is used for judgment.

What makes a textile have a good color fastness?

Some printed and dyed textiles are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand-washing, and grinding. This demands that the color of printed and dyed textiles relatively maintain a specific fastness, i.e. good color fastness performance.

What is the meaning of the word colorfast?

Having color that will not run or fade with washing or wear: a colorfast fabric. col′or·fast′ness n. American Heritage® Dictionary of the English Language, Fifth Edition.