Textile Engineering
Testing & Quality
57 interactive Testing & Quality tools. Every one shows its formula, a worked example and the standards it follows.
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- Air, Sea or Split: Late Shipment Expedite Sheet Worth of Choosing Style by Style
- Brownfield Expansion: What the Next Increment Costs Shared Plant the Proposal Forces
- Built Into the Fibre or Applied to the Cloth: What Protection Costs Over a Life What Moving to the Cheapest Protection Saves
- Buyer Chargeback: Contest, Fix or Accept Recoverable a Year
- Buyer Cost to Serve & Development Recovery Net Margin After Serving the Book
- Buyer Quotation Generator Order Value
- Buyer Terms & Effective Price Comparison Best Offer, Once Its Terms Are Paid For
- Buyer Test Plan & Laboratory Budget Laboratory Cost for the Range
57
tools
Testing & Quality
Advanced ISO/ASTM Testing & Metrology · Product Engineering, Specifications & Feasibility · Testing, Standards & Metrology · Textile Testing & Quality Control
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Advanced ISO/ASTM Testing & Metrology 11
- Where to Set the Acceptance Limit When the Laboratory Is Not Certain Premium Separates the two things a release test gets wrong - good lots downgraded because the reading was low, and out-of-specification lots shipped because the reading was high - and finds the acceptance limit and the number of replicates that cost least across both. Then prices the three ways out against each other: a sharper laboratory, a steadier process, and a mean put back in the middle. What Setting the Limit Properly Is Worth cost/yr
- Ball Burst Strength & Deformation Modeler (ASTM D6797) Recovers multi-directional strain at failure from a ball burst test: the dome geometry the distension implies, arc length and strain at burst, equivalent pressure under the ball and burst force normalised to fabric weight and thickness. Strain at Burst %
- CMC(l:c) Tolerance Ellipsoid Boundary Calculator Builds the CMC acceptability ellipsoid around a colour standard: the SL, SC and SH weighting functions, the lightness, chroma and hue semi-axes at the working l:c ratio and commercial factor, and the volume of colour space they enclose. Lightness Semi-Axis ΔL*
- Elmendorf Pendulum Energy & Tear Force Calculator Derives Elmendorf tear force from pendulum physics: potential energy at the raised and returned positions, the energy the tear absorbed, and the force per ply that energy represents over the standard tear length. Tear Force per Ply N
- Four-Point System Fabric Defect Index Calculator Grades a fabric roll on the four-point system: total penalty points from defects in each length band, the roll area in hundred-square-yard units, points per 100 yd² against the acceptance limit and the penalty budget still available. Penalty Density points/100 yd²
- Grab vs Strip Tensile Conversion Calculator Converts a strip tensile result into the grab equivalent by modelling fabric assistance from the unclamped width, and reports how much of the grab reading that assistance is actually contributing. Predicted Grab Strength N
- ISO 139 Conditioning Time to Moisture Equilibrium Estimates how long a textile must sit in the standard atmosphere to reach moisture equilibrium: conditioning time to a stated tolerance, the half-time of the approach, regain still remaining after a day and the moisture the sample will take up. Conditioning Time h
- Peel Adhesion of Reinforcing Fabrics Calculator (ASTM D4393) Reduces a three-specimen peel adhesion series for fabric vulcanised to rubber: mean peel force, adhesion per unit width, the scatter across specimens and the margin against a specification minimum. Peel Adhesion N/mm
- Sewn Seam Failure Mode Predictor (ASTM D1683) Predicts whether a sewn seam will fail in the thread or in the fabric: thread-derived seam strength from stitch density, the governing seam strength and efficiency, and the stitches per centimetre needed to move failure into the fabric. Governing Seam Strength N/25mm
- Sweating Guarded Hotplate Ret, Rct & Permeability Index Reduces guarded hotplate measurements to the ISO 11092 outputs: thermal resistance Rct, evaporative resistance Ret, the moisture permeability index that relates them, and the tog and clo equivalents of the thermal figure. Evaporative Resistance Ret m²Pa/W
- Yarn Evenness CVm% to Thin & Thick Place Predictor Converts yarn mass irregularity into predicted imperfections: the z-score each sensitivity threshold represents, thin and thick places per kilometre from the normal tail, total imperfections and the equivalent U% figure. Thin Places per km
Product Engineering, Specifications & Feasibility 16
- Which Development Gates Earn Their Place Premium Prices the bench, the laboratory panel, the pilot yardage and the held first bulk lot against the problems each of them catches and the cost of catching those problems one stage later instead. Returns the order quantity above which each gate pays for itself, and applies it across a development book that is almost always over-tested at the bottom and under-tested at the top. What the Right Gates Are Worth cost/yr
- Design of Experiments Factor & Run Planner Plans an economical factorial experiment: runs in the fractional design, total runs including replication and centre points, design resolution, effects estimable, total cost and time, and the saving against a full factorial. Total Runs Required runs
- Fabric Hand & Performance Specification Matrix Maps subjective hand onto measurable properties: deviation from target for bending rigidity, compression, drape, stretch and friction, the weighted total deviation, a composite hand index and the single property furthest from target. Composite Hand Index index
- Finished-to-Greige Dimension & Weight Back-Calculation Works back from a finished fabric specification to greige settings: required greige width and GSM, greige length per hundred finished metres, the area ratio shrinkage imposes, finish add-on mass and the greige length an order requires. Required Greige Width cm
- Material Substitution Equivalence Comparator Compares a proposed fibre substitute against the original: equivalence ratio on tenacity, moisture regain, density and cost, a weighted equivalence score, the fabric weight change density implies and the cost saving offered. Weighted Equivalence Score %
- Measurement System Analysis (Gage R&R) Calculator Separates equipment repeatability from operator reproducibility, combines them into total gauge R&R, and reports the result against both acceptance criteria — percent of study variation and percent of tolerance — plus the number of distinct categories the gauge can resolve. Gauge R&R (% of Study Variation) %
- Measurement Uncertainty Budget Builder Combines instrument, sampling, conditioning, operator and method uncertainties in quadrature to a combined standard uncertainty, expands it by the coverage factor, and reports the reportable interval around the measured value plus the share of variance owned by the largest component. Expanded Uncertainty U %
- Pilot-to-Bulk Scale-Up Readiness Checker Scores six scale-up dimensions — recipe, machine, sample, capacity, risk and commercial approval — against their weights, compares the result with the release gate, and reports the shortfall, the weakest dimension, the score that dimension alone would need, and how many sit below the critical threshold. Weighted Readiness Score /10
- Product Risk & Critical-to-Quality FMEA Matrix Ranks failure modes for action: risk priority number, criticality from severity and occurrence, the RPN after planned actions, the reduction achieved, margin over the action threshold and what detection or occurrence improvement would each achieve alone. Risk Priority Number RPN
- Product Specification Limits & Process Capability Builder Converts customer tolerances into specification limits and tests them against the process: upper and lower limits, capability index for mass and strength, the weaker of the two, and the process standard deviation each property would need to reach a target capability. Limiting Capability Cp
- Response Surface Operating Window Optimizer Finds the process window satisfying two opposing responses: the bound each specification imposes, the feasible band between them, the midpoint setting, both responses at that setting and the tighter of the two margins. Operating Window Width units
- Specification Tolerance Cost-of-Quality Modeler 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. Additional Annual Reject Cost currency
- Target GSM to Yarn Count & Construction Solver 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. Required Warp Count Ne
- Technical Data Sheet Completeness & Control Checker Audits a technical data sheet before it is issued: coverage of test methods, tolerances and units across the listed properties, a combined completeness score, approval sign-off status, and whether the document is past its controlled review interval. Overall Completeness %
- Tolerance Stack-Up Calculator for Textile Specifications 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. Root Sum Square Tolerance ± %
- Woven Construction Feasibility Checker Tests whether a target construction can be produced: reed dents per centimetre required, Peirce cover factor, total ends, and the margin available against reed density, cover factor and loom pick rate limits. Feasibility Margin ×
Testing, Standards & Metrology 8
- Blended Yarn Commercial & Invoice Weight Calculator Converts an as-received blended consignment to its commercial invoice weight using the mass-weighted official regain of the two fibres, showing oven-dry weight, the water actually present and how far the billing weight differs from the shipped weight. Commercial Invoice Weight kg
- Crocking (Rubbing) Colourfastness Assessment Averages dry and wet crocking grades across three specimens, compares each against its own buyer specification, and reports the dry-to-wet gap that distinguishes unfixed surface dye from genuine poor fastness. Binding Margin grades
- Elmendorf Tear Strength & Energy Calculator (ASTM D1424) Converts an Elmendorf pendulum scale reading into tear force per ply in gram-force and newtons, the tear index normalised to fabric weight, the work absorbed over the standard tear length and the margin inside the valid scale window. Tear Force per Ply gf
- Fabric UPF (Ultraviolet Protection Factor) Predictor Models fabric ultraviolet protection from cover factor, fibre transmittance and dye absorbance: UV transmission, the UPF it implies, the labelled UPF after standard rounding, and the ceiling that open area alone imposes. Predicted UPF
- Grab Tensile Strength Statistics Calculator (ASTM D5034) Reduces five grab tensile specimens to reportable statistics: mean breaking force, sample standard deviation, coefficient of variation, range, the 95% lower confidence limit and the margin over a specified minimum. Mean Breaking Force N
- Martindale Abrasion Weight Loss Extrapolator Extrapolates Martindale abrasion mass loss from a measured interval: loss rate per thousand cycles, projected loss at a target cycle count, and the cycles the specimen will take to reach a defined failure threshold. Cycles to Failure Threshold no.
- MVTR & Evaporative Resistance (Ret) Calculator Converts a cup-test mass loss into moisture vapour transmission rate per day and per hour, the evaporative heat flux it represents, and the evaporative resistance Ret that breathability specifications are written against. MVTR g/m²/24h
- Wind-Degraded Thermal Resistance (Tog & Clo) Matrix Degrades a still-air tog rating for wind speed and fabric air permeability, returning effective tog, clo and Rct in wind, the percentage of insulation lost and the wind penetration factor for extreme weather layering. Effective Thermal Resistance tog
Textile Testing & Quality Control 22
- Buyer Test Plan & Laboratory Budget Premium Prices a buyer test protocol on what each test is actually run on rather than per style, which is where the budget is lost: a test sensitive to the material runs once per material, one sensitive to the dyeing runs once per colourway, and one sensitive to both runs on every combination. Counts the retests a first-pass rate implies, names the single line carrying most of the bill, and reports the longest turnaround as the date it puts into the calendar. Laboratory Cost for the Range cost
- What a Defect Costs, Decided by Where It Was Found Premium Costs every defect against the value the material had reached by the stage it was caught, rather than against a single average, and reports the defect rate beside the money it actually cost - two figures that move independently. Then prices the counterfactual that matters: what the same faults, in the same quantity, would have cost had they been found one stage upstream. Saved by Finding the Same Faults One Stage Earlier cost/yr
- What a Performance Guarantee Costs, and How Long It Should Run Premium Reserves against a performance guarantee from the failure distribution rather than from experience of claims that have not arrived yet. Prices every candidate term against the premium the market pays for it, finds the term that actually pays, reports how much dearer doubling the term is, and inverts the question - what the failure shape and the characteristic life would have to be for the guarantee on offer to break even. What the Guarantee You Offer Costs a Year cost/yr
- Which Tests Your Own Laboratory May Run, and Which It May Not Premium Routes a buyer's test programme through the standards crosswalk this site maintains, asking of every specified method whether your laboratory's accreditation actually reaches it. Identical means the result transfers and the test stays in house; modified means the method differs in a stated way and the result is challengeable; not equivalent means the sample goes out. A standard the crosswalk has not yet checked is reported as unverified rather than guessed at in either direction. Prices the routing against the two usual policies — send everything out, or run everything in. What Routing Costs cost/yr
- Yarn Count Deviation: Length Delivered Against Length Contracted Premium Turns a delivery of tested yarn lots into the length actually received against the length the nominal counts promised, values the gap twice - as a credit note at yarn price and as lost production at contribution - and separates the lots that are short from the ones whose surplus is quietly paying for them. Net Length Not Delivered km
- Air Permeability & Fabric Porosity Calculator Converts an air permeability reading between metric and imperial units and calculates volumetric porosity from fabric weight, thickness and fibre density, for activewear, filtration and technical textiles. Air Permeability CFM
- AQL Sampling Plan Generator (ISO 2859-1) Generates the ISO 2859-1 single sampling plan for a garment or fabric lot at General Inspection Level II, returning sample size, acceptance and rejection numbers, and whether the defects found pass the inspection. Sample Size pcs
- Blue Wool Lightfastness Rating from Exposure Places measured exposure hours on the logarithmic blue wool scale, returning the achieved rating and the standard it rounds to, the hours a target grade demands, the margin either way and the equivalent AATCC fading units. Achieved Rating BW
- Colour Difference Delta E & CMC Acceptability Calculator Computes CIE Delta E*ab and the CMC(l:c) colour difference between a standard and a batch from spectrophotometer L*a*b* readings, and judges the result against the commercial tolerance. Delta E CMC dE
- Fabric Drape Coefficient & Bending Rigidity Calculator Calculates drape coefficient from a drapemeter shadow area and bending rigidity from a Shirley cantilever overhang, the two objective measures behind fabric handle and garment fall. Drape Coefficient %
- Fibre Content Label: Declared Blend, Test Result & Tolerance Compares a declared fibre composition against a test result fibre by fibre, applies the tolerance as percentage points of total fibre weight rather than as a percentage of the declared figure, shows the band each declaration allows, and removes the tolerance where the label claims a single fibre. Margin Against Tolerance pp
- Grey Scale Staining Rating Interpreter Converts a measured colour difference on the multifibre adjacent fabric into an ISO 105-A03 grey scale staining grade, and reports the margin against the minimum grade a buyer requires. Grey Scale Grade grade
- Knitted Fabric Bursting Strength Modeler Predicts diaphragm bursting pressure for a knitted fabric from its wale and course tensile strengths using a thin-walled sphere model, and reports the result in kPa, kgf/cm2 and psi. Predicted Bursting Strength kPa
- Overall Moisture Management Capability from MMT Indices Normalises the three moisture management tester outputs onto their index scales, blends them into the OMMC with the standard weighting, returns the grade, and identifies which index is limiting and what perfecting it alone would be worth. Overall Moisture Management Capability index
- Pilling Propensity Index Calculator Converts Martindale pilling test counts into pill density and a cycle-normalised propensity index, so fabrics assessed over different cycle counts can be compared against a rating specification. Pilling Index pills/1000 cycles
- Replicate Statistics for a Lab Result Turns the readings from a set of test specimens into the mean, sample standard deviation, CV% and a confidence interval built on the correct t value for the specimen count - the summary every textile test report has to carry, whatever property was measured. Coefficient of Variation %
- Restricted Substance Limit: Result, Uncertainty & the Next Limit Places a laboratory result against a restricted substance limit with its expanded uncertainty, applies a guard band to give an acceptance limit, converts the result between mg/kg, ppb and percent, and reports the margin against a later limit that a stepped-down threshold will bring. Headroom to Acceptance Limit mg/kg
- Seam Slippage against Cloth Cover Factor Computes warp, weft and Peirce cloth cover factors from sett and count, takes the worse of the two measured slippage forces against specification, and solves the cover factor and pick density a target resistance would actually require. Governing Slippage Force N
- Seam Strength & Efficiency Calculator Calculates seam efficiency from seam and fabric breaking strength, the absolute strength lost at the seam, and the seam strength a target efficiency specification would demand. Seam Efficiency %
- Tear to Tensile Strength Ratio Calculator Compares tear strength against tensile strength to expose fabrics that test strong in tension but tear easily, and normalises both by fabric weight so different constructions can be judged fairly. Tear to Tensile Ratio %
- Textile Unit Converter: Fabric Weight, Tenacity & Yarn Length Converts fabric weight between GSM, ounces per square yard, grams per linear metre and ounces per linear yard; yarn tenacity between centinewtons per tex, grams per denier, breaking length and true stress in megapascals; and yarn length between metres per kilogram and yards per pound. Fabric Weight oz/yd2
- Thermal Resistance TOG & Clo Value Predictor Converts fabric or wadding thickness and thermal conductivity into thermal resistance, then into TOG, clo and imperial R-value, the insulation scales used to specify winterwear and bedding. Thermal Resistance TOG
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