Package Dyeing I—A Theoretical Model and its Relation to Technical Practice

The general problem of package dyeing is outlined and a theoretical model is discussed in detail. This is the first step in an attempt to gain a fuller understanding of the basic processes operating within the package. The model is shown to lead to results which are in general agreement with observations from standard dyeing practice. The necessity of avoiding high exhaustion is confirmed by the model, and it is emphasised that level dyeing is most likely to be secured by rapid flow and low exhaustion. A number of ways in which the practical dyer may seek to produce uniformly dyed packages are examined critically from the point of view of their feasibility in commercial dyeing.