Greige Fabric Storage Requirements and Preservation Standards
Unfinished greige fabric preservation demands humidity control between 50 and 65 percent relative humidity to prevent size retrogradation and oil oxidation.
Enzymatic Desizing Efficiency
Starch Cleavage
Catalytic breakdown of alpha-glucan polymers converts water-insoluble sizing starches into water-soluble dextrins during fabric preparation. Processing plant measurements monitor enzymatic desizing efficiency to verify that alpha-amylase enzymes reduce long-chain amylose molecules into short oligosaccharides. Interlaced cotton grey goods require complete size removal prior to bleaching and dyeing.
Amylase cleavage targets alpha-1,4-glucosidic bonds without damaging native cellulose chains. The hydrolysis stops when starch concentration falls below detection limits in liquid rinses.
Hydrolysis Rate
Enzyme activity depends on precise bath temperature and pH conditions within the desizing liquor. Amylase formulations operate between sixty and ninety degrees Celsius.
Bath Parameter
Liquor saturation and dwell time determine how deeply enzymes penetrate dense warp structures. Pad-batch processes require sixteen hours of rotation at ambient temperature to complete starch solubilization. Continuous steam desizing accelerates conversion within two minutes under high temperature conditions.
Insufficient bath wetting agents slow down enzyme transport into yarn core spaces.
Iodine Standard
Quantitative assessment relies on potassium iodide staining combined with weight loss measurements of dried fabric samples. Treating desized cloth with aqueous iodine produces visual color ratings from blue-black down to pale yellow on Tegewa rating scales. A Tegewa score of six or higher marks successful starch extraction.
Fabric lots failing to reach required ratings yield uneven dye absorption in subsequent processing steps.