Table of Contents
Topping For Cotton Fabric
Topping is defined as the addition of color to the fabric after completing one dyeing process. Sometimes it is found that the dyed fabrics do not match with the standard or buyer-approved swatch then it needs to be re-dyeing, this process is called topping. The tipping sequence is near similar to the full dyeing sequence.
Process Sequence Of Topping For Cotton Fabric Dyeing
Generally, topping is done for the cotton fabric which is dyed by the reactive dyes. Here, I have given a topping process sequence on the cotton fabric which is dyed by the reactive dyes.
The required amount of water-filled
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The fabric was loaded and run for 10 min.
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Drain
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The required amount of water-filled
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Adding Acetic acid for 5 min.
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The temperature increased to 600 C
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Run for 20 min.
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Rinsing for 10 min.
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Drain
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Require amount of water-filled
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A wetting agent was added
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The temperature increased to 950 C
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Run for 30 min.
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Ringing for 20 min.
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Leveling agent added for 10 min.
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Salt dosing
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Color dosing for 30 min
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Run for 10 min
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Soda dosing
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Run for 1 hrs
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Temperature increase at 600C for 5 min
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Run for 10 min
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Shade check (OK)
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Rinsing for 20 min.
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Drain
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Adding acetic acid for neutralization for 10 min
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Shade check (ok)
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Hot wash at 700C
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Rinsing for 10 min.
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Adding the fixing agent for 10 min
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Rinsing for 10 min.
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Filling at the required amount of water
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PH check at 5.5
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Adding Softener
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Final shade checks and run for 20 min
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Unloading the dyed fabric
Above all, after completing a dyeing process, the shade of the dyed fabrics is checked by the quality control department. If the shade of the dyed goods does not match with the buyer’s approved swatch then they give a decision for topping or stripping.
In sum, topping is an additional process that adds extra dyeing cost to the dyeing process. So, a textile engineer should be aware of the dyeing of the fabrics.
3 comments
Deepak yadav
Nice blog…
Can you pv poly fabric sequence of finishing
LEE SOO JAE
I’m interesting in dyeing and printing
Md Majharul Islam
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