Determining Raw Cashmere Fibre Micron Profiles in Scoured Bales
Determining raw cashmere fibre micron profiles in scoured bales requires core sampling, lipid extraction, and truncated bimodal histogram distribution analysis.
Residual Grease
Lanolin Content
The quantity of natural wax remaining on wool fibres after industrial washing determines the clean yield and processing characteristics of the batch. This residual grease is measured as a percentage of the dry wool weight, usually by solvent extraction in a laboratory. It represents the wax that survived the scouring stage.
Wool Scouring
Monitoring residual grease ensures that the scouring bowls are operating at the correct temperature and surfactant concentration. If the grease level falls below zero point three percent, the wool becomes brittle and prone to breakage. If it exceeds one percent, the wool remains sticky.
This stickiness clogs the pins of the carding machines, leading to frequent production shutdowns.
Spinning Performance
A small amount of remaining fat acts as a natural lubricant that aids the carding and combing of wool fibres. When residual grease is kept within the optimal range of zero point five to zero point eight percent, it protects the fibres from static electricity and fibre breakage. Proper lubrication maintains the average fibre length during yarn production.
Dyeing Defect
High concentrations of unsaponifiable wax create hydrophobic barriers on the wool surface that reject water-borne dyestuffs. Uneven distribution of residual grease leads to blotchy dyeing, streaks, and poor color fastness in the finished yarn. Textile mills must test each lot to ensure the grease level is uniform before the wool enters the dye vat.
This preventative measure avoids costly rework and dyehouse rejects.