Sizing Agent Selection for Fine Spun Bast Yarns
Optimal fine bast yarn sizing requires balancing PVA and CMC polymers to achieve eleven percent dry add-on without causing warp brittleness.
ISO 20743
Standard Specification
International laboratory test methods established to evaluate the antibacterial activity of finished antibacterial textiles determine the efficacy of sanitary treatments. The standard ISO 20743 is widely utilized in the linen industry to certify the performance of antimicrobial finishes applied to flax fabrics. This protocol provides quantitative procedures to assess how effectively a treated textile inhibits bacterial growth over a specific period.
Testing Methodology
Laboratory technicians inoculate both treated and untreated linen samples with specific bacterial strains, measuring the concentration of viable bacteria before and after incubation. Under the ISO 20743 standard, the antimicrobial activity is calculated by comparing the growth rate on the treated sample against a control. This test can be conducted using different inoculation methods, such as absorption, plate transfer, or printing, depending on the surface characteristics of the fabric.
Because linen is often used for home textiles and apparel, achieving a high activity value under this standard is a key buyer requirement. The resulting data confirm that the finishing treatment remains active after repeated laundering cycles.
Market Acceptance
Certified antimicrobial performance adds significant commercial value to linen products intended for medical, hospitality, or high-end home use. Compliance with ISO 20743 provides buyers with verified evidence of hygiene performance. This assurance accelerates the export of treated linen to international markets.