Vat Dyes on Cotton - Duranthrene Dyeing Method

Application of Duranthrene Dyes on Cotton (Exhaust Method)

Time/Temperature Graph

At A add Duranthrene Dye (Dispersed)
x m/l Caustic Soda 66° TW (36°Be)
y g/l Hydrosulphite Conc
0-3% NEUTRASOL CR

At B add z g/l Common salt or Glaubers salt anhydrous in portions

For chemical requirement please see table below

At C FINISH OFF

Rinse (with sodium bicarbonate if necessary)
Oxidise by:
- air
cold water or
2-4ml/l hydrogen peroxide at 30-60° C for 15 mins.

Soap off with 2g/l NEUTRASOL SCL for 20 mins. at 95-98°C

Rinse hot and cold

Required Amounts of Chemicals for Vat Dye Bath

Dye	Chemicals	Liquor Ratio
		5:1	10:1	20:1
0.1 - 1%	NaOH	9 - 12	7 - 8	6 - 7	ml/l
	Hydros	3 - 4.5	2 - 3	1.5 - 2	g/l
	Salt	6 - 8	7 - 9	7 - 9	g/l

1 - 3%	NaOH	12 - 7	8 - 11	7 - 9	ml/l
	Hydros	4.5 - 7	3 - 4.5	2 - 2.5	g/l
	Salt	8 - 13	9 - 14	9 - 17	g/l

3 - 5%	NaOH	17 - 22	11 - 14	9 - 11	ml/l
	Hydros	7 - 10	4.5 - 6	2.5 - 3	g/l
	Salt	13 - 18	14 - 20	17 - 24	g/l

5 - 7%	NaOH	22 - 27	14 - 17	11 - 13	ml/l
	Hydros	10 - 13	6 - 8	3 - 4	g/l
	Salt	18 - 23	20 - 26	24 - 31	g/l

All information is provided for guidance and in good faith but without guarantee. Suitability for application and end use requirements remain the users responsibility. Illustration of the product does not imply freedom from patent restrictions in any particular market.