The quality of dyed and printed fabrics is subject to high requirements, particularly in terms of dye fastness. Dye fastness is a measure of the nature or degree of variation in the dyeing state and is influenced by various factors such as yarn structure, fabric organization, printing and dyeing methods, dye type, and external forces. Different dyeing fastness requirements can lead to significant cost and quality differences.
Sunlight fastness is a crucial aspect of dye fastness, referring to the degree to which colored fabrics change color when exposed to sunlight. It is categorized into 8 levels, with level 8 representing the highest and level 1 the lowest. Fabrics with poor sun fastness should be shielded from prolonged sun exposure and dried in a ventilated, shaded area.
Rubbing fastness, on the other hand, measures the degree of color fading of dyed fabrics after rubbing and can be assessed through dry rubbing and wet rubbing. It is graded on a scale of 1 to 5, with higher values indicating better rubbing fastness. Fabrics with poor rubbing fastness may have a limited service life.
Washing fastness, also known as soaping fastness, evaluates the color change of dyed fabrics after being washed with detergent. It is divided into 5 levels, with level 5 representing the highest and level 1 the lowest. Fabrics with poor wash fastness may require dry cleaning to maintain their color integrity.
Ironing fastness is a measure of the degree of discoloration or fading of dyed fabrics when ironed. It is graded from 1 to 5, with level 5 being the best and level 1 being the worst. When testing the ironing fastness of different fabrics, the test iron temperature should be carefully selected.
Perspiration fastness assesses the degree of color fading of dyed fabrics after being exposed to sweat. It is categorized into levels from 1 to 5, with higher values indicating better perspiration fastness.
Overall, the various aspects of dye fastness play a critical role in determining the quality and longevity of dyed and printed fabrics. Understanding and addressing these factors are essential for ensuring the durability and colorfastness of textile products.
Post time: Sep-09-2024