Bath Tension
Aqueous preparation alters the natural lignin profile of raw flax yarn before mechanical spinning begins in regional mills. Chemical immersion baths modify the structural rigidity of bast fibre bundles by dissolving pectin polymers that cement individual technical cells together. Plant technicians monitor bath temperatures and alkali concentrations continuously to prevent alkaline degradation of cellulose chains inside the fibre core.
Strict chemical recovery protocols govern spent liquor disposal according to provincial environmental protection standards.
Liquor Ratio
Bath volumes are calculated against dry material weight inside stainless steel treatment vessels. Solution stoichiometry dictates that liquor ratios remain constrained between ten to one and twenty to one during caustic boiling stages. Excessive fluid volume dilutes active hydroxide ions and reduces reaction kinetics across densely packed yarn packages.
Precise dosing schedules prevent uneven penetration through thick hanks of unspun line flax.
Chemical Yield
Hydroxide treatment alters fibre mass through controlled dissolution of non-cellulosic impurities. Dried yarn samples undergo gravimetric analysis to measure alkali mass loss against baseline weights recorded prior to immersion. Final acceptance depends on residual pectin content falling below strict tolerance limits established by export quality agreements.
Excessive weight loss signals over-treatment and compromises tensile strength during subsequent high-speed drawing operations.
