Analytical Technique
Infrared absorption measurement across mid-frequency spectrum bands provides chemical characterization of cellulosic polymers and surface waxes in flax fibre samples. Molecular bond vibrations produce distinct absorption peaks that identify lignin, pectin, hemicellulose and crystalline cellulose ratios. Modern mill laboratories utilize FTIR spectroscopy to evaluate chemical retting efficacy and monitor degumming progression in raw bast materials.
Rapid non-destructive scanning enables quality technicians to assess large sample sets without hazardous solvent extractions.
Composition Measurement
Attenuated total reflectance accessories press dry fibre bundles against a diamond crystal to capture surface spectra within seconds. Spectral peak intensity at seventeen hundred thirty reciprocal centimeters indicates carbonyl stretching associated with residual pectin and hemicellulose. Lower peak heights at this wavenumber confirm thorough pectin removal during chemical boiling, ensuring optimal fibre bundle separation for wet spinning.
Infrared analysis of FTIR spectroscopy spectra also detects surface oil contamination, sizing residues and synthetic polymer blends in recycled linen streams. Laboratory software compares sample spectra against reference libraries to calculate relative chemical composition percentages. Automated baseline corrections ensure reproducible quantification across different operator shifts and sample preparations.
Mill technicians generate automated spectral reports that accompany high-grade sliver batches sent to export clients.
Quality Verification
Rapid chemical fingerprinting prevents improperly scoured or contaminated fibre lots from entering high-speed spinning production lines. Residual binder gums cause yarn unevenness and drafting failures on ring frames if not detected prior to roping. Chemical compliance certificates derived from spectral data provide transparent quality assurance for premium linen fabrics.
Buyers use these chemical profiles to verify organic processing claims and origin authenticity.
