I. Precise Proportioning: Dosage Determines Success
Textile auxiliaries are not a case of "the more the better." Pretreatment agents (such as scouring agents and desizing agents) are typically used at 1-3 g/L of fabric weight; excessive amounts will damage fiber strength. Dyeing leveling agents are generally used at 0.5-2 g/L; excessive amounts can easily cause color variations and spots. It is essential to determine the optimal concentration based on the manufacturer's technical instructions and small-sample test results, and to dynamically adjust according to the bath ratio and water hardness, avoiding a "one-size-fits-all" approach of blindly adding agents.

II. Dissolution and Dilution: The Order Must Not Be Disordered
Most auxiliaries need to be fully dissolved and diluted in warm water (40-60℃) before being added to the bath. Anionic and cationic auxiliaries must not be mixed directly, otherwise they will instantly flocculate and become ineffective; nonionic auxiliaries have better compatibility and can be added before other auxiliaries. During operation, the principle of "water first, then agent; dilute first, then concentrated; add while stirring" should be followed to ensure uniform dispersion and prevent localized high concentrations that could lead to stains.

III. Process Matching: Temperature and Time are Key
Different auxiliaries are sensitive to temperature. Enzyme preparations (such as cellulase) are best used at low temperatures of 45–55℃; higher temperatures will deactivate the enzyme. Fixing agents typically require temperatures above 60℃ for full cross-linking. Soaking time is also crucial: soaping agents generally require 15–30 minutes, while softeners require baking and curing at 150–180℃ for 3 minutes. The process curve must be strictly followed; a temperature deviation of ±5℃ may affect the final result.

IV. Post-treatment and Wastewater Management
After use, thorough rinsing with water is necessary to remove residual auxiliaries and prevent decreased color fastness and skin irritation. Simultaneously, attention should be paid to wastewater pH adjustment and COD treatment; auxiliaries should be degraded before discharge.

Proper operation is essential for auxiliaries to truly enhance the quality of textiles.