Fastness failures refer to the degree to which a fabric retains its color and appearance after being subjected to various conditions such as washing, light exposure, and rubbing. Reactive dyed cotton fabrics are more prone to certain types of fastness failures compared to other types of dyed fabrics.

Shades that are more prone to fastness failures in reactive dyed cotton fabrics include:

Light Fastness

Lightfastness refers to the ability of a fabric to resist fading when exposed to light. Lightfastness is often a concern for fabrics that are used for upholstery or other applications where the fabric is exposed to direct sunlight for extended periods of time. Lightfastness is typically more of a concern for reactive dyed cotton fabrics, as reactive dyes are known to be more sensitive to light exposure.

Wash Fastness

Wash fastness refers to the ability of a fabric to retain its color after being subjected to washing or other forms of agitation. Wash fastness is often a concern for garments and other textiles that are intended to be frequently washed. Reactive dyed cotton fabrics are typically more prone to wash fastness failures, as reactive dyes are known to be less stable when exposed to washing and other forms of agitation.

Rub Fastness

Rub fastness refers to the ability of a fabric to retain its color when subjected to friction or rubbing. Rub fastness is often a concern for garments and other textiles that are subject to a high degree of friction, such as pants or skirts. Reactive dyed cotton fabrics are typically more prone to rub fastness failures, as reactive dyes are known to be less stable when subjected to friction and rubbing.

Perspiration Fastness

Perspiration fastness refers to the ability of a fabric to retain its color when exposed to perspiration or other forms of body moisture. Perspiration fastness is often a concern for garments and other textiles that are worn close to the skin, such as shirts and underwear. Reactive dyed cotton fabrics are typically more prone to perspiration fastness failures, as reactive dyes are known to be less stable when exposed to body moisture.

It is important to note that these are general guidelines, and the colorfastness of a reactive dyed cotton fabric can also be influenced by other factors such as the pH of the washing solution, the temperature of the wash, and the type of detergent used. By understanding these factors, you can choose the right fabric for your specific needs and minimize the risk of fastness failures.