Minimum Warp Lengths That Decide Whether a Sample Becomes Production
Minimum warp lengths depend on creel setup waste, sizing lead length, and loom setup hours, requiring at least 1,000 metres for viable production runs.
Dry Pickup
Chemical Retention Measurement
The percentage of dry chemical solids deposited onto a fabric after finishing and drying represents a core metric for monitoring chemical treatment efficiency. Measurement of dry pickup determines the actual amount of active finish, such as softeners or resin, that remains on the linen yarn or fabric. This metric is independent of the water content used during the padding process.
Process Calculation Variable
Calculating this value requires measuring the wet pickup of the fabric first and multiplying it by the concentration of the finishing bath. A mill starts with the weight of the dry fabric before padding, measures it again immediately after squeezing to find the wet weight, and then dries it to find the final weight. The dry pickup can then be computed by dividing the dry chemical weight by the original dry fabric weight.
This process ensures that the target chemical concentration is applied uniformly across the entire batch.
Finishing Quality Effect
Inadequate or excessive retention of these chemicals directly alters the handle and performance of the linen fabric. If the value falls below the specification, the fabric may remain stiff or fail to meet wrinkle-resistance targets. Excess chemical retention can degrade fiber strength.