Acid dyes are one of the most commonly used dyes for dyeing wool, widely used for dyeing wool fibers and fabrics due to their simple dyeing process, bright color, and complete chromatography. The following is a detailed introduction about dyeing wool with acid dyes:

1. Characteristics of acid dyes
-Chemical structure:

Acid dyes are anionic dyes that contain acidic groups such as sulfonic acid groups (- SO3H) or carboxyl groups (- COOH) in their molecules, and are easily soluble in water.

-Dyeing mechanism: Under acidic conditions (pH 2-6), dye anions bind with cationic groups in wool fibers (such as amino NH ∝⁺) through ionic bonds, while enhancing fixation through hydrogen bonding and van der Waals forces.

-Applicability: Suitable for protein fibers such as wool and silk, as well as synthetic fibers such as nylon (polyamide).

Precautions using acid dyes
-Temperature control: High temperatures (above 95 ℃) may cause damage to wool (yellowing, rough texture).
-PH adjustment: Strong acidic conditions can easily damage fibers, while weak acidic or neutral baths are milder.
-Uniform dyeing problem: The structure of wool scales can easily cause uneven dyeing, which requires slow heating or the addition of leveling agents.

Our factory is producing different color of acid wool dyes for 30 years, including acid yellow 36, acid yellow 11, acid red 52, acid green, acid orange 7, acid black att and acid red