Check List in Exhaust Dyeing for Reactive Dyestuffs

11.12.16

Check List in Exhaust Dyeing for Reactive Dyestuffs

Check Exhaust Dyeing and the hardness of water with Test-strips Hardness and the Bicarbonate with. You can read about Safe Chemical Handling Procedure and Policy

Methyl-Orange + HCI Test

Check the Hardness from the salt with Test-strips Hardness and NaOH Test
Check the concentration of NaOH you will use to dye ( if different, make a conversion )
Check the recipe calculation for the Reactive dyestuffs and for the auxiliaries
Control the workman :
If you give to him g/l amount, He has to use a balance ( to measure a weight )
If you give him cc/l amount, He has to use a cylinder or pipette ( to measure a volume )

Check on the good :

the pH with pH test paper
the hardness with Hardness test-strips
the Peroxide residual with Peroxide test-strips ( if just bleached material )
If the total amount of hardness from the water, the salt and the material is more than 10°d,

Try to reduce it :

For the water : Increase the Ladiquest 1097
For the salt : Change salt to good quality
For the material : Make a Acid scouring
If it is not possible, try to Exhaust Dyeing with the Only Soda ash method
If the total amount of hardness from the water, the salt, the material is more than 10°d :
In according with the temperature method, add at the beginning, or by pre-metering
(ADCON pump) the necessary amount of NaOH to neutralize the Bicarbonate
Control the workman while he is weighing the Reactive dyestuffs
Check the machinery :
The dependability of thermometer
The power of circulation pump (in package or spool dyeing of yarn goods)
The speed of engine (in rope dyeing for knit goods)
Check the Liquor Ratio during the Exhaust Dyeing

Remember :

It. Total amount of water - (minus)

It. Water needed for the dyestuffs - (minus)

It. Water needed for the Alkali = (equal)
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It. Start amount of water in the dye-machinery

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