Wet and dry processes that deliver the final hand and look. This section explains practical decision criteria, typical test methods, and failure modes that matter in real production. Readers get checklists, calculation steps, and case examples connecting specifications to cost, reliability, and compliance. Links map core concepts to upstream inputs and downstream processes so choices remain consistent across sourcing, manufacturing, and end-use performance. Each article includes definitions, diagrams where helpful, and plain-language notes to help newcomers ramp quickly while giving experienced professionals the depth needed to troubleshoot and optimize. Standards references are cited with context, and whenever trade-offs exist, we make them explicit so you can defend decisions. The coverage also includes metrics, data tables, and example calculations so results are reproducible. Where regulations apply, we highlight jurisdiction, scope, and verification pathways. Tools and templates are provided to speed up daily work without sacrificing rigor.
Factory Physics & Assembly Logistics
Models the thermal load on a ring traveller: surface speed, centrifugal and yarn-tension contributions to normal force, friction power dissipated and the heat flux over the contact patch that decides whether the traveller burns.
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Product Engineering, Specifications & Feasibility
Propagates yarn, construction, process and finishing tolerances into a product tolerance: root sum square and worst-case stack, margin against the specification, the share of variance owned by the largest contributor, the tolerance it would need for a tighter spec, and the sigma level achieved.
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Product Engineering, Specifications & Feasibility
Prices a tolerance change: converts current and proposed limits into sigma levels and reject rates in ppm, costs the additional rejects across annual volume, and compares that against the process improvement needed to hold the tighter limit at unchanged capability.
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Advanced Colour Physics & Wet Processing
Estimates disperse dye lost to sublimation during pad-thermosol curing of polyester: the temperature-corrected loss rate, the share of dye sublimed away over the dwell, and the dye actually retained on the cloth.
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Machine Performance & OEE
Computes overall equipment effectiveness for continuous textile machines: availability from downtime, performance against the ideal rate, quality from defective output, the OEE product and each of the three losses expressed back in minutes.
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Product Engineering, Specifications & Feasibility
Solves the yarn counts a target fabric mass requires: warp and weft count in Ne and tex, the mass each direction contributes, the warp share of fabric weight and the resulting cover factor.
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Mill Operations & Industrial Engineering
Matches a delivery deadline to factory capability: required daily output and takt time from the order and calendar, operators the SMV demands, daily capacity from the operators assigned, the resulting surplus or shortfall and days to complete.
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Specialized Chemistry & Advanced Dye Physics
Models the lotus effect on treated fabric: Cassie-Baxter apparent contact angle from solid fraction, the competing Wenzel state, droplet radius and adhesion force from contact angle hysteresis, and the surface tilt at which a drop rolls off.
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Advanced Colour Physics & Wet Processing
Models a supercritical CO₂ dyeing vessel: disperse dye solubility by the Chrastil density correlation, dye dissolved per pass, passes needed for the recipe, CO₂ charge mass, the equivalent liquor ratio and the reduced pressure and temperature.
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Denim Manufacturing & Specialized Wet Processing
Sizes a stone wash load: fabric weight, pumice weight at the working ratio, the combined load against machine capacity, and the stone lost to attrition each cycle with its cost per garment.
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