Acid donor for dyeing polyamide and wool with acid dyes
PERISTAL WAD allows for an easy control and setting of the pH value. The product is used for dyeing of polyamide and wool. Depending on the individual substrate, the quantity used and dyeing procedure, a final pH value of 5.5 – 6.0 is obtained when using PERISTAL WAD.
PERISTAL WAD is an ester which in the aqueous medium is slowly saponified. Saponification takes place during the dyeing process when raising temperature and during boiling. Due to the acid which is set free the pH value is displaced in direction of increasing acidity. This increases the dyeing speed.
By means of pH control and slowly decreasing pH value levelled dyeings can be obtained. If at the same time a suitable levelling agent is added to the dyeing bath (for example PERIGEN SMV) best results can be obtained.
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