Thermomigration is a general term, used to describethe diffusion of disperse dyes out of dyed or printed polyester fibre duringheat treatments, and their accumulation on the fibre surface. With theintroduction of the permanent press finish, there were considerable problemswith polyester/cotton qualities due to thermomigrated dyes.


Thermomigrationis a complex phenomenon and it can be governed by several factors viz., type offibre, chemical constitution of disperse dye, dye content in the substrate, finishingagent applied etc.


Thepresent work was undertaken to obtain general information on the role of thefollowing factors on the amount of thermomigrated dyes and their subsequenteffect on washing and rubbing fastnesses.


  • Dye energy levels.
  • Dye concentration on dyed fabrics.
  • Time of thermal treatment.
  • Type of finishing agents and their concentrations.



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Aboutthe Authors


The authors are associatedwith Department of Textile Chemistry, Faculty of Technology & Engineering, TheM S University of Baroda.