DYEING PROPERTIES OF WOOL TREATED WITH LIQUID-AMMONIA

Wool fibre and fabric have been treated with liquid ammonia and their surface characteristics investigated by means of SEM and ESCA techniqu es. The treated specimens were dyed with levelling and milling acid dy es. Although no changes in nitrogen content and fibre surface properti es were detected, their dyeing rate was increased considerably as was saturation dye exhaustion. Dyeing properties were similar to those of wool treated with low-temperature plasmas by glow discharge. Fabrics t reated with liquid ammonia were dyed at various temperatures in the ra nge 30-80 degrees C, and dye uptake was similarly increased.