Visual Banding
Repeating horizontal or vertical bands appearing across the width of finished cloth signal a failure in tension control or material consistency. This barré defect identifies a pattern that is usually not apparent until the fabric has been dyed or finished. Quality assurance teams use high-intensity light to detect these patterns early in the production cycle.
Machine Synchronization
Faulty coordination between the supply rollers and the take-up reel creates these visible patterns in the weave. When the loom motor speed fluctuates, the barré defect manifests as a change in the number of picks per inch. Maintaining constant drive speed and checking for worn bearings reduces the occurrence of these errors.
Electronic sensors help alert operators to uneven winding before a large quantity of fabric is processed.
Grading Standard
Finished goods are categorized based on the visibility of these bands under standard lighting. A barré defect that is visible from a distance of three meters usually results in the material being sold as a second. International standards define the maximum number of allowable faults per roll of linen.
The presence of multiple bands in a single piece often leads to a total rejection of the shipment by the buyer.