Sublimation Fastness and Sublimation Fastness Tester

 

What is sublimation fastness?

Fastness to ironing（color fastness to hot pressing）

Fastness to ironing refers to the degree to which a dyed fabric changes color or fades when pressed.
The degree of discoloration is determined by the staining of other fabrics with the iron. Scorch fastness is graded from 1 to 5, with 5 being the best and 1 the worst.
When testing the scorch fastness of different fabrics, the test iron temperature should be selected.
Dry pressing
Dry specimen is pressed with a heating device at a specified temperature and pressure for a specified time.
Damp pressing
A dry specimen is covered with a wet cotton adjacent fabric and pressed with a heating device at a specified temperature and pressure for a specified time.
Wet pressing
The upper surface of a wet specimen is covered with a wet cotton adjacent fabric and pressed with a heating device at a specified temperature and pressure fora specified time.

Sublimation fastness（color fastness to dry heat）

Sublimation color fastness refers to the degree to which the sublimation of dyed fabric occurs in storage.
Sublimation fastness The degree of discoloration, fading and stain of white cloth after hot pressing treatment is evaluated by grey grading sample card, which is divided into 5 levels, with 1 being the worst and 5 being the best.
The dyeing fastness of normal fabrics is generally required to reach level 3 ~ 4 in order to meet the needs of wearing.
Principle
Specimen of the textile in contact with either one or two specified adjacent fabrics is heated by close contact with a medium which is heated to the required temperature. The change in colour of the specimen, and the staining of the adjacent fabric are assessed with the grey scales.
The influencing factors of sublimation fastness
It is related to the dye itself: low temperature dye is the worst and high temperature dye is the best.
Related to the heat treatment temperature of dyeing: the temperature of setting after baking should be mastered well. Too high or too low temperature will affect the fastness to sublimation.

Sublimation fastness tester

Application：
YG605 Series Scorch and Sublimation Fastness Tester is used to determine the color fastness to hot pressing and dry heat and to conduct sublimation tests. Providing controlled conditions of dry heat and pressure with top and bottom heated surfaces, electronic temperature controller and carefully controlled top plate weight.
Feature：
  • Equipped with MCU to control time and temperature, and over-temperature safety function to shut down the unit in case of over-heating.
  • High quality temperature sensor (PT100), more accurate to control temperature and more endurable.
  • Two separate heating coils for top or bottom hot plate can be individually operated under relative standards.
  • Temperature of 3 group heating blocks is separately controlled (For YG605-III).

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