Off-Loom Contraction

Fabric Analysis

Weavers measure this dimensional change by marking a set distance on the fabric while it is still under tension on the loom and measuring it again after cutting. This difference is expressed as a percentage of the original on-loom length. High warp density increases the crimp of the filling yarns, which leads to a greater contraction rate.

In flax mills, technicians record this percentage in the production log to ensure the final washed cloth meets the buyer’s width specifications. This parameter varies with yarn count and twist levels. By establishing a standard contraction coefficient for each weave pattern, the mill avoids waste and ensures that finishing machinery operates at optimal efficiency.

Weaving Adjustment

Accurate prediction of this shrinkage prevents the mill from producing fabric that is too narrow or too short for the buyer’s order. Loom operators adjust the reed width and warp length based on the expected contraction rate to achieve the correct finished dimensions. This calculation ensures that the delivered linen fabric matches the contract specifications after finishing.