Why does sewing thread pay so much attention to color fastness?

Color fastness has a very large impact on the use of daily sewing threads and during the washing process, and will also manifest differently in different temperature, physical or chemical environments. For consumers outside the textile industry, reading this article can enrich their knowledge base, while for professionals in the textile field, it is necessary to understand the relevant knowledge of color fastness.

The concept of color fastness

Color fastness is also called color fastness, color fastness. It refers to the resistance of the color of the sewing thread to various effects during processing and use, and is an important indicator of the sewing thread. At present, most of the color fastness test methods are simulated tests or comprehensive tests according to the environment and conditions of the action, and the fastness grade is evaluated according to the discoloration of the sample after the test and the staining of the lining fabric. What is more special is that the color fastness to light is rated by the blue label, while the color fastness to dry cleaning is rated for solvent staining.

Why does sewing thread pay so much attention to color fastness?

DTY Polyester Textile Yarns will be subjected to various external effects such as light, washing, ironing, perspiration, friction and chemicals during use. Some special sewing threads are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand washing, Grinding, etc., which requires the color and luster of printed and dyed textiles to maintain a certain fastness.

Whether the color fastness is good or bad will directly affect the health and safety of the human body to a certain extent. During the use of sewing threads with poor color fastness, rain and sweat will cause the pigments on the fabric to fall off and fade. Molecules and heavy metal ions may be absorbed by the human body through the skin and endanger the health of the human skin. On the other hand, it will also affect the production process and other leather materials, clothing is stained, or other clothing is stained when washing with other clothing.

For consumers, it is necessary to carefully read the labels of the textiles before washing clothing and textiles, and analyze the fabrics of the textiles before deciding whether to wash them with water or dry cleaning, and which type of detergent to use for washing, so as to avoid the discoloration of the textiles.