Learning Objectives.
State the conditions required for batch and batch and continuous dyeing methods for direct dyes.
Understand the advantages and disadvantages of common methods of after treatment.

Questions.
Use the conditions given for batch dyeing and draw a typical profile for group B direct dyes. (Students will need to refer back to the information given in 1.7 to complete this.
Name the fixatives used in after treatment and evaluate their use for improving the wet fastness of direct dyes on cellulosics.