Abstract
The 100% cotton twill fabrics were dyed by indigo blue leuco solutions that containing indigo blue (5 gdm-3) sodium hydroxide (8gdm-3) sodium dithionite (12 gdm-3) and auxiliaries (1 gdm-3), the auxiliaries used are dispersing agent NNOleveling agent Peregal O-25alkali resistant penetrant SDR and color deepening penetrant DP individually. The properties of auxiliarys solutions and the performance of dyed fabrics were tested and measured, the results shown that the color yield of indigo blue dyeing with DP increased by 15% compared to the others, its washingrubbing fastness also improved.
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