Specifications for Sodium Acetate Used in Textile Fabric Dyeing

In certain textile dye formulations, textile grade sodium acetate is utilised for pH adjustment of dye baths. Acid dyes on nylon or wool textiles may be used using acetic acid and sodium acetate, the dosage amounts must be established by testing, depending on the dye, fibre and colour sample.

Applicable stages

For dyeing nylon and wool using acid dyes , you may add sodium acetate and acetic acid to the dye bath to modify the pH . Adding just sodium acetate will not necessarily buffer the bath . Reactive dyes on cotton and viscose need fixing, usually under alkaline circumstances, and hence cannot be used under the same pH conditions.

Selection of Ingredients and Formulation

Verify the purity, moisture, metal ion concentration and insoluble matter of the product. Set the desired pH depending on the dye requirements and fabric type. Do small scale experiments for precipitation before mixing with dyes, levelling agents or fixing agents. Record the dye absorption, shade and colour fastness.

On-site use

Dissolve the raw ingredients completely and feed gradually under circulation. Check the dye bath pH occasionally and alter according to colour samples. If the stock solution is continuously supplied by a metering pump, the concentration and flow rate should be adjusted to avoid excessive local concentrations.

Key Points for Raw Material Selection

Sodium acetate is excellent for dye compositions needing acetate for pH adjustments in the dye bath. When you buy the material, be sure to note the criteria for purity, moisture content, and insoluble matter. The ratio of the dose, the shade obtained and the colour fastness should be validated by small-scale experiments using the particular textiles and dyes of the facility.