Continuous Dyeing of Piece Goods Using Radio-frequency Heating. Part 2 – Migration Induced During Dyeing

Reactive dyes on open-width cotton fabric migrate during drying using r.f. energy. This migration, contrary to expectations, is greater than that obtained when using conventional hot-air drying. The extent of dye migration is reduced by an increase in the electrolyte concentration of the dye pad liquor. A possible explanation of r.f.-induced dye migration is proposed