The suitability of redox systems for wool dyeing with acid and active dyes at temperatures below the boiling point of the dyeing solutions was studied. The influence of the hydrogen peroxide3reductant (glucose, ethylene glycol, 1,2,3-propanetriol, polyoxymethylene, and hexamethylenetetramine) systems on the surface of wool roving was elucidated.Finishing of wool fiber fabrics governs to a significant extent the quality and competitiveness of ready-for-use textile articles. As is known, wool preliminarily damaged by dyeing, light exposure, and high temperatures, as well as by alkalis, chlorine, and oxidants, is especially sensitive to mechanical loads (pressure, twisting, shear). Mechanical treatment of wool fibers causes various transverse and longitudinal cracks, depending on the moisture content of the fibers. These cracks are responsible for dust formation upon degradation of the cuticle when treated on fast rotating machines, which poses risks on human health. Most of the wool lint is formed in the yarn production stage. However, wool dyeing causes respiratory tract diseases more often than other jobs do, because dyed yarn exceeds undyed yarn in the dust content [1].Wool is traditionally dyed at the boiling temperature of the dyeing solution, which may lead to inefficient use of raw materials and energy. Therefore, it is of great practical importance to develop processes for low-temperature dyeing of wool, which damage the fiber and contaminate the environment to a lesser extent and are more energy-efficient. Low-temperature dyeing can be performed with the use of redox systems, tems, which allows the temperature at which the wool fiber is dyed with acid and active dyes to be lowered from the boiling point of the solution to 80oC, and the treatment time, to be made a factor of 1.532 shorter [2].In this study, we took as dyeing intensifiers hydrogen peroxide3reductant systems with glucose (system no. 1), ethylene glycol (system no. 2), 1,2,3-propanetriol (system no. 3), polyoxymethylene (system no. 4), and hexamethylenetetramine (system no. 5) as reductants.When introduced into a dye bath, reagents with high redox potentials cause degradation of the wool fiber and, possibly, of the chromophore system of the dyes. In this context, we studied how the above systems affect the structure of the wool substrate.To determine the optimal oxidant : reducer ratio in the systems, we estimated the redox potentials of a number of intensifiers. The optimal concentration of the reductant, favoring the maximum sorption of acid and active dyes, is 0.00753 0.015 M [3]. The figure shows the electrochemical potentials at the actual concentrations of hydrogen peroxide and the reductant. Fig. 1. Redox potential j of system nos. (a) 1, (b) 2, (c) 3, (d) 4, and (e) 5. H 2 O 2 3reductant concentrations, M: (1) 0.00753 0.0075, (2) 0.0153 0.015, (3) 0.033 0.03, (4) 0.153 0.15, (5) 0.033 0.0075, (6) 0.06 30.015, (7) 0.123 0.03, (8) 0.63 0.15, (9) 0.033 0.0075, (10) 0.063 0.015, (11) 0.123 0.03, (12) 0.63 0.15, (13) 0.0223 0.0075, (14) 0.0...