The existence of optimality criteria for viscose and spinning bath compositions is advanced as a working hypothesis. The degree of preparation of viscose for spinning is expediently characterized not only by the ripeness index and viscosity, but also by the chemical composition: the ratio of sodium trithiocarbonate (TTC)/NaOH_fr. A ratio of approx 2.0-2.1 should be considered optimum. Specific conductivity on the level of 32-33 S centre dot m~(-1) is the criterion of spinning bath activity.
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