Process Sequence Of Topping For Cotton Fabric Dyeing

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

The fabric was loaded and run for 10 min.

Drain

The required amount of water-filled

Adding Acetic acid for 5 min.

The temperature increased to 600 C

Run for 20 min.

Rinsing for 10 min.

Drain

Require amount of water-filled

A wetting agent was added

The temperature increased to 950 C

Run for 30 min.

Ringing for 20 min.

Leveling agent added for 10 min.

Salt dosing

Color dosing for 30 min

Run for 10 min

Soda dosing

Run for 1 hrs

Temperature increase at 600C for 5 min

Run for 10 min

Shade check (OK)

Rinsing for 20 min.

Drain

Adding acetic acid for neutralization for 10 min

Shade check (ok)

Hot wash at 700C

Rinsing for 10 min.

Adding the fixing agent for 10 min

Rinsing for 10 min.

Filling at the required amount of water

PH check at 5.5

Adding Softener

Final shade checks and run for 20 min

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 thoughts on “Process Sequence Of Topping For Cotton Fabric Dyeing”

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