Alkaline Treatment
Pre-treatment phase in linen processing where alkaline solutions remove non-cellulosic impurities from flax fibres. Performing chemical scouring ensures that natural waxes and pectins are stripped away to leave the cellulose core ready for dyeing. The process typically involves boiling the yarn or fabric in a solution of caustic soda at high temperatures.
Fibre Purification
Impurities that hinder moisture absorption are dissolved through the action of the chemical bath. This treatment opens the structure of the flax to allow for more uniform penetration of bleaching agents and dyes later in the production cycle. Precise control over the concentration of the scouring liquor prevents the degradation of the cellulose chains which would otherwise weaken the material.
If the temperature remains too low, the pectin remains trapped between the fibres. High alkaline levels combined with excessive heat can cause irreversible damage to the natural strength of the linen.
Finish Quality
Fabric that undergoes a thorough cleaning exhibits a higher degree of whiteness and a softer handle. Incomplete removal of fats and oils leads to blotchy coloring or poor adhesion of finishing resins. Successful execution of the scouring stage determines the long-term stability and appearance of the finished linen cloth.
