Dimensional Contraction
Percentage changes in fabric length and width during wet processing define the stability of loom-state textiles. Textile laboratories measure greige shrinkage to determine how much a woven linen fabric will compress when exposed to hot water and steam. Raw linen cloth contains starch-based sizing and natural flax waxes that hold the yarns in a state of high tension.
When these substances are scoured away during finishing, the yarns relax and the fabric contracts significantly.
Processing Calibration
Calculation of the required yarn counts and reed width must account for the dimensional changes that occur in the finishing department. If the greige shrinkage of a linen fabric is not calculated accurately during the design phase, the finished cloth will fail to meet the buyer’s specified width and density requirements. Finishers adjust their tentering and sanforizing machines to compensate for this natural relaxation, ensuring that the final product maintains consistent dimensions throughout subsequent washing cycles.
Acceptance Standards
Sourcing contracts for export markets set strict limits on the permissible variation in fabric dimensions after commercial laundering. Excessive greige shrinkage leads to customer rejections and financial penalties for the mill. Testing according to international standards ensures that every batch of exported linen falls within the agreed tolerances.
