Sublimation Fastness
Sublimation fastness is a quality characteristic that indicates resistance to dyed synthetic fibers vaporizing and migrating due to heat or contact materials, contaminating other textiles or resins.
Contents6 sections
Definition and Overview
Sublimation fastness is a quality characteristic that evaluates the risk of dye migrating from a dyed textile surface when heated and staining other materials in contact with it. It is especially confirmed in synthetic fibers such as polyester dyed with disperse dyes.
Here, sublimation refers to the phenomenon in which dye becomes more likely to migrate due to heat. Not only heat, but also plasticizers contained in soft PVC and similar materials can cause dye to transfer to contacting materials.
Appearance and Product Impact
If sublimation fastness is low, color transfer may occur to white or light-colored lining, interlining, printed areas, synthetic leather, vinyl accessories, and similar items. This can cause not only appearance defects in the product but also problems during storage or distribution.
Sublimation fastness does not directly indicate softness of hand feel, thickness, gloss, or stretch. It may be listed alongside a soft hand feel, but hand feel evaluation and resistance to color transfer are checked separately.
Main Applications and Situations Requiring Confirmation
It is checked for products that use dyed textiles such as polyester, including sportswear, uniforms, costumes, and jackets or outerwear with lining. It is especially important for designs that layer dark and light colors, or products that include heat-using processes.
In laminating, coating, printing, and fusing fusible interlining, the risk of color transfer changes depending on the combination of contact material and heat conditions. Evaluation is based not only on the test result of the outer fabric alone, but also on the actual combination with accessories.
- When combining dark textiles with white or light-colored lining
- When the specification involves contact with soft PVC or synthetic leather
- When performing heat pressing, ironing, or fusing
- When assuming long-term storage or transportation environments that may become hot
Selection and Handling Notes
When selecting a textile, check the test conditions and judgment results for sublimation fastness, and determine the required standard for the product application at the planning stage. In particular, for dark-colored items, preliminary evaluation with the actual lining, interlining, resin sheets, and similar materials to be used is effective.
During sewing and finishing, avoid high-temperature, long-duration pressing, and control temperature, time, and pressure appropriately. Sublimation fastness does not indicate shrinkage or color fading from washing, so shrink resistance, wash fastness, and rub fastness must also be checked separately.
Difference from Similar Terms
Fastness is a general term for resistance to color change and staining of other materials. Sublimation fastness focuses on dye migration caused by heat and similar factors. Wash fastness refers to resistance under washing liquids and washing actions, while rub fastness refers to color transfer due to friction.
Color bleeding is a practical term that broadly describes a phenomenon in which dyes or pigments seep out and stain the surrounding area. In contrast, sublimation transfer and sublimation migration are used in relation to sublimation fastness to refer to dye migration caused by heat or plasticizers.
Frequently Asked Questions
What are the benefits of high sublimation fastness?
It makes dye migration due to heat or contact materials less likely, reducing the risk of color transfer to light-colored lining, resin materials, synthetic leather, and similar materials. However, this is a different evaluation from resistance to color fading during washing, staining due to friction, and fading caused by sunlight.
Can sublimation fastness be checked on care labels?
Care labels indicate how to wash, dry, iron, and otherwise handle the item at home, and do not directly show the grade or test results for sublimation fastness. If necessary, check the test data from the textile supplier and evaluate it according to the product specifications.
How can sublimation migration be prevented during sewing?
Conduct combination tests in advance including the outer fabric, lining, interlining, prints, and resin accessories that will come into contact, and control pressing conditions. For dark synthetic fibers, check the bonding process and storage conditions as well. If problems are expected, consider changing the materials or specifications.
