Abstract
Absorption isotherms at high temperatures for some disperse dye vapours and secondary cellulose acetate film have been determined and found to be linear. In order to calculate dye vapour concentrations, two methods have been used for the determination of vapour pressures, and from the results it is shown that disperse dye molecules can associate in the vapour phase. The absorption of dye vapour by polyester fibre in the form of small packages over the range 180–220°C, as well as a laboratory machine that can be used for this purpose, are described. Package dyeing on a larger scale with dye vapour is considered to be possible.
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