No abstract

Reduced swelling produced by the steaming of fibres has been investigated for its stability. Samples of steamed fibres have boon given hot dilute‐acid and alkaline treatments. The reduced swelling of steamed viscose and cuprammonium fibres was found to bo reasonably stable to the treatments given to them.

Changes of the properties of fibres after various thermal treatments have been investigated, and it has been found that the amount of change depends on the moisture content and the temperature of treatment. Swelling, moisture absorption, and dye absorption decrease, whilst density increases, as a result of the thermal treatment.