Application Ratio
Mass uptake represents the ratio of solid chemical matter deposited onto a substrate during liquid finishing treatments. Size pickup percentage quantifies the net gain in weight attributed to starch or sizing agents relative to the original dry mass of the yarn.
Processing Baseline
Calculating this value requires comparing the bone dry weight of the textile before and after the immersion bath. Operators remove solvent or water through thermal drying to ensure the remaining weight accounts only for the sizing substance. This procedure isolates the dry residue from the carrier fluid.
Technical Boundary
Excess amounts of size cause stiffness or brittleness that leads to thread breakage during high tension weaving phases. Insufficient pickup results in surface fuzzing or yarn abrasion when the shuttle or rapier makes contact. Maintaining the correct range balances yarn protection against the risk of chemical waste.
Fabrication Impact
Uniformity in the deposition process determines the consistency of the hand feel and dye affinity in later stages. Variation across the warp indicates a failure in squeeze roller pressure or uneven viscosity in the sizing box. Production teams manage the pickup to protect physical properties while minimizing the chemical cost per kilometer of yarn.