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Quality of
leveling/dispersing agents
Leveling and dispersing agents:
Auxiliaries with sequestering and dispersing
properties for dyeing cotton and cotton blends with reactive dyes by
controlled coloration process are marketed as leveling and dispersing
agents. Efficient nitrogen free, non-foaming sequestering agent with
excellent sequestering action against calcium, magnesium, and heavy
metals are selectively used for the purpose of leveling in reactive
dyeing. These leveling agents are
stable to high temperatures and effective over a wide pH range.
Nowadays it becomes a practice to use
these leveling agents in all regular and complicated shades of reactive
dyeing. The ionic nature of these
type of leveling agents are either non-ionic or anionic.
Benefits of leveling agents:
- Eliminates calcium and magnesium
precipitation or lime soap deposits on textile goods and prevents
scale formation on machinery.
- Improves water absorbency and softness
of fabrics.
- improves winding properties of yarn
- improves brightness of dyeing
- improves level dyeing performance of
reactive dyes
- improves reproducibility of dyeing
- prevents precipitation of dyestuff
- prevents shade changes caused by traces
amounts of heavy metal ions.
- reduces possibilities of spots on dyed
fabric
Test Methods for quality and consistency:
Specific gravity:
Accurately weigh 10
ml of the leveling agent. Specific gravity = Volume/Mass. Note down the
value and do this test whenever your receive a new consignment and
compare against the first supply.
Solid content:
Refer procedure of wetting agent.
pH of 1% solution:
Dissolve 1 gram of
the leveling agent in 100 ml of distilled water.
Ionic Nature:
Check the stability of
this product against the addition of acid and alkali under processing
temperature of 70C
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