Evaluation Protocol
Analytical procedures determine the physical and chemical properties of phloem-derived plant fibres before mechanical processing begins. Through systematic bast fibre testing, mills measure parameters such as fineness and moisture content. This stage of testing applies to raw and scutched flax, allowing spinners to group incoming materials into distinct processing lots.
Technicians extract samples from different parts of the bale to ensure that the moisture and impurity levels represent the entire consignment rather than a single surface layer. By performing these tests early, the mill avoids processing defective bales that could damage the spinning equipment.
Processing Impact
Line efficiency in the spinning mill depends directly on the cohesion and length of the starting material. When processors conduct bast fibre testing, they identify batch variations that might otherwise cause excessive yarn breakage on the spinning frame. The data obtained from these tests guide the settings of the drawing and combing machines, adjusting for variations in fibre stiffness.
Acceptance Criterion
Fibre characteristics must align with the contracted specifications established between the supplier and the spinning mill. Standardised bast fibre testing establishes whether a shipment meets these requirements, forming the basis for either accepting the delivery or lodging a formal quality claim. These measurements are documented in laboratory reports that accompany the material across the supply chain.
