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A practical framework for testing saleable output, register, waste, curing, changeovers, and contractual acceptance

 

JULY 2026

For procurement managers, converters, and press engineers

A flexographic printing machine FAT should answer a commercial question: can the contracted press produce acceptable work at a repeatable net rate using the buyer's materials, job files, operators, and finishing route? A demonstration at maximum speed cannot answer that question. It can omit makeready, acceleration, stops, roll changes, curing limits, inspection alarms, die-cut register, and the rejected material that separates gross motion from saleable production.

The available evidence supports a measured acceptance framework but not one universal pass mark. ISO 12647-6 and FIRST 7.0 provide process-control principles, while FTA purchasing guidance connects requirements to factory acceptance. None prescribes a standard number of meters per minute, a single register tolerance, or a universal waste percentage for every substrate and job. Those values must come from the buyer's product mix and be written into the contract before the test. The practical goal is therefore not to prove that the press can move fast. It is to prove, with traceable records, how much compliant output it can deliver and what losses occur on the way.

Saleable Output Is the Acceptance Metric, Not the Nameplate Speed

Saleable output refers to the printed and converted material that meets the agreed acceptance limits within the complete measured test window. Rated speed, by contrast, is a machine specification. It normally states how fast the web can run under a selected configuration, but it does not disclose how much time is lost to setup, how much material is consumed before color and register stabilize, whether the dryer can support the speed, or how much output the inspection system rejects.

That distinction matters most in short-run label and packaging work. A 2016 APR study based on a survey and interviews with more than 100 US narrow-web converters reported that presses were unavailable for setup and changeovers for more than 30% of production time and averaged six to seven changeovers per shift per press [APR Narrow-Web Flexo Study]. These figures are historical, supplier-sponsored US evidence rather than a current global benchmark. They are still useful because they identify the loss categories that a speed demonstration can conceal.

FTA's narrow-web selection guidance similarly tells buyers to evaluate automation, control, waste, changeovers, service, inspection, and total cost of ownership rather than maximum speed alone [FTA Narrow-Web Press Selection Guide]. A high limit creates little value when normal jobs are constrained by drying, fragile films, cleaning, die-cut waste, or stops.

A simple model makes the difference visible. Assume a press runs for 60 production minutes at a gross 120 m/min and prints 7,200 m. If 240 m is startup waste and 360 m is rejected, accepted output is 6,600 m and first-pass yield is 91.7%. If the measured window also includes 30 minutes of setup and adjustment, the saleable-output rate is 73.3 m/min, not 120 m/min. This is an illustrative calculation, not an industry average: accepted length / total elapsed minutes = 6,600 / 90.

Manufacturer specifications should therefore become test inputs, not acceptance evidence. For example, Zhejiang Weigang Technology Co., Ltd. publishes a maximum speed of 180 m/min, four to 12 colors, three printing-width options, independent servo drives, several film categories, and optional inline functions for its ZJR-350G/450G/650G series [Weigang ZJR-350G/450G/650G Specifications]. These are company-published configuration claims. A buyer should independently verify the ordered model using its own substrates, ink coverage, repeat lengths, curing system, inspection settings, and finishing modules, then compare accepted meters and waste against the contract.

The FAT should calculate gross printed length, accepted length, reject length, and elapsed time, with every loss assigned a cause. One combined waste figure can hide a press that performs well only at steady speed.

ACTION： Put accepted length, first-pass yield, saleable-output rate, setup time, and waste by cause in the FAT schedule before agreeing to a rated-speed claim.

A Representative FAT Job Matrix Recreates the Buyer's Real Work

A representative FAT job matrix means a documented set of jobs chosen to reproduce the materials, process demands, and transitions that determine the buyer's real production risk. A supplier's standard demonstration file may show attractive print, but it usually has known plates, familiar ink, convenient coverage, a stable repeat, and a substrate already tuned to the press. It proves that one prepared combination can run; it does not prove that the purchased configuration fits the buyer's order book.

FTA's narrow-web purchasing guidance recommends defining machine requirements, included and optional equipment, installation, training, maintenance, OEM support, and factory acceptance in the negotiated agreement [FTA Narrow-Web Purchasing Guide]. Its wide-web guidance goes further by recommending tests with two or three representative production jobs [FTA Wide-Web Purchasing Guide]. The exact number is not universal, but the principle is strong: acceptance work should be selected by the buyer and linked to contracted performance.

Start with production data rather than intuition. Group the previous six to 12 months of work by substrate family, web width, repeat length, color count, ink system, coverage, finishing route, and run length. Then select a compact matrix that covers the high-volume center and the costly edges. A label converter might include a routine paper label, a thin unsupported film with demanding tension control, and an opaque-white film job with heavy ink coverage and inline die cutting. A flexible-packaging converter would use a different matrix and may need reverse print, lamination-related bond tests, or food-packaging controls.

Each test job needs a locked specification. Record the substrate supplier, grade, thickness or basis weight, width, and lot; ink series and batch; plate material, thickness, screening, mounting tape, and repeat; anilox line count, measured volume, and cell geometry; dryer or UV/LED configuration; target speed range; print sequence; die, cylinder, tooling, and waste matrix; inspection recipe; and required finished-roll condition. Substituting an easier film, lower coverage, different white, or slower converting route during FAT changes the test and requires written approval.

Print-quality references should be selected at the same stage. ISO 12647-6:2020 covers process control, colorimetric aims, responsibilities, and recommended tolerances for four-color flexographic printing across labels, boxes, flexible packaging, publications, and proofs; ISO reviewed and confirmed the edition in 2025 [ISO 12647-6:2020]. FIRST 7.0 adds measurement and verification to its optimization, fingerprinting, process-control, characterization, and improvement workflow [FTA FIRST 7.0]. These references can anchor color and measurement language, but neither determines whether the machine must change a job in eight minutes or waste no more than a buyer-defined number of meters.

The matrix should include transitions as well as individual jobs. Changing from paper to film, from light process work to heavy opaque white, or from one die repeat to another can expose washup, tension, curing, tooling, and recipe-recall problems. A press that produces three good samples after separate preparation may still fail the commercial workflow if the contracted automation cannot reproduce settings or if the complete changeover takes too long.

Use a normal job to establish repeatability, a difficult job to challenge configured limits, and a planned changeover to measure recovery. Mark an unusually severe case as a capability trial unless it represents actual sold work.

ACTION： Freeze a buyer-owned job matrix with materials, tooling, recipes, quality limits, and changeover sequence as a signed contract attachment.

Dynamic Testing Measures the Losses Hidden by a Stable-Speed Sample

Dynamic testing refers to measuring press behavior through startup, acceleration, steady production, disturbances, stops, restarts, roll changes, and job changeover. A stable-speed sample tests only the easiest phase. It can miss web-tension excursions, register recovery, dryer lag, splice disturbance, impression changes, inspection delays, and the material consumed before production returns to an acceptable state.

FTA's automation analysis links job setup and recall, register and pressure control, roll splicing, washup, defect detection, reporting, and predictive maintenance to narrow-web productivity [FTA Press Automation Analysis]. That linkage should shape the test. If automatic register, non-stop unwinding, inspection, recipe recall, or quick-change tooling is included in the order, it must operate during FAT rather than being shown in isolation or left for later commissioning.

Use a phase-based run record. The following measures are proposed FAT definitions, not universal industry standards:

Test phase	Record	Proposed acceptance logic
Initial setup	Minutes and material from released job to first sustained good output	Limit time and startup waste separately
Acceleration	Register, color, tension, cure, defects, and rejected length by speed band	Quality must remain within the agreed limits up to the contracted saleable speed
Steady run	Accepted and rejected length over an agreed duration	Demonstrate repeatability, not one short sample
Controlled stop/restart	Time and waste until sustained good output returns	Set a recovery-time and recovery-waste limit
Splice or roll change	Register disturbance, rejected length, and inspection response	Verify the ordered non-stop or semi-automatic function
Job changeover	Last sustained good output of job A to first sustained good output of job B	Include washup, tooling, recipe loading, setup, and approval

 

"Sustained good output" needs a definition. One acceptable meter followed by oscillating register is not recovery. The contract could require a defined continuous length or time within all quality limits before the event is considered complete. The buyer must set that period from its inspection and roll-disposition practice. A 30-second window may be meaningful for one label job and inadequate for another; presenting either as universal would be unsupported.

Instrument the test with synchronized evidence. Use machine event logs, encoder or roll-length data, speed histories, tension and register trends where available, inspection reports, waste counts, and time-stamped samples. Collect samples at startup, agreed speed bands, before and after a stop, across a splice, and after changeover. Reconcile reported waste with roll length, counted labels, or weighed material when practical. If the machine dashboard and physical reconciliation disagree, record the discrepancy rather than choosing the more favorable value.

Inspection systems also require a challenge. Agree a small library of documented, controlled defects relevant to the buyer's jobs, such as missing print, contamination, register shift, streaking, or a finishing defect. Seed them safely in a test roll or use the supplier's validated simulation method, then confirm detection, alarm, mapping, and report retention. This does not establish a universal detection rate; it verifies the contracted configuration against an agreed challenge set.

After training, require the buyer's operator to recall a job, perform an agreed changeover, respond to a stop, and restore good output. Record supplier intervention and separate machine loss, procedure gaps, and training gaps.

ACTION： Run one continuous, time-stamped FAT sequence that includes acceleration, a controlled stop, a roll event, and a real job changeover rather than approving isolated samples.

Objective Quality Limits Turn a Good-Looking Sample into Evidence

An objective quality limit refers to an agreed measurement method, sampling rule, condition, and pass/fail value for printed or converted output. "Good print" is not an acceptance criterion; the FAT must define what is measured, where, how often, and what follows a failure.

For process color, use the applicable ISO 12647-6 aims and tolerances or a buyer-approved characterization, with the measurement geometry, backing, instrument, calibration, control-strip locations, and reporting method identified [ISO 12647-6:2020]. FIRST 7.0's measurement-and-verification framework can support control elements, print characteristics, barcodes, ink testing, and ink trapping [FTA FIRST 7.0]. Spot colors require separately agreed targets and tolerances because the four-color standard does not turn every brand color or substrate into one universal limit.

Register acceptance should distinguish print-to-print, print-to-cut, and finishing relationships. Define measurement location, sample frequency, deviation calculation, and production phases. Verify claimed servo or automatic-register functions across selected substrates, repeats, speeds, stops, and changeover; unrealistic limits create false failures and cost.

Drying and curing are product requirements, not a lamp-on check. FTA's ink-system guidance explains that water-based inks dry more slowly and can require stronger air drying, while UV systems introduce heat, equipment, plate-compatibility, and incomplete-cure risks [FTA Ink-System Guidance]. The FAT should therefore use the contracted ink, substrate, anilox volume, coverage, dryer or lamp, and speed. Agree the relevant checks, such as blocking, adhesion, rub or chemical resistance, odor, lamination bond, or migration evidence for the finished application. A surface that feels dry may still fail its downstream use.

ASTM D5264-98(2019) is an active practice for comparing abrasion resistance of printed labels and packaging with a Sutherland rub tester. ASTM identifies it as a method buyers and sellers can use against a predetermined abrasion requirement [ASTM D5264-98(2019)]. Merely writing "passes ASTM D5264" is incomplete. The contract must define conditioning, load, number of cycles, receptor, evaluation method, and acceptable damage. Similarly, a tape test should not be borrowed casually: ASTM D3359's formal scope centers on relatively ductile coatings on metallic substrates, so applying it to printed flexible film requires an agreed, validated adaptation [ASTM D3359-23].

For inline converting, record print-to-cut register, matrix stripping, label or liner damage, edge quality, and roll condition. Define job-specific checks for cold foil, lamination, coating, slitting, or rewinding, and sample steady and transition zones.

Predefine whether a failed measurement triggers resampling, adjustment and rerun, or rejection. Preserve failed samples and corrective actions so neither party can change the sample rule after seeing the result.

ACTION： Convert every visual approval into a method, instrument, sampling plan, numeric or categorical limit, and predefined failure-disposition rule.

Contractual Acceptance Connects FAT Evidence to Payment and SAT

Contractual acceptance means linking the agreed test methods and results to documented decisions about correction, shipment, payment, warranty, installation, and final site acceptance. A detailed test has little value if the purchase order does not identify which requirements are mandatory, who signs the record, whether deviations remain open, and what commercial consequence follows a failure.

FTA purchasing guidance says the agreement should address delivery, payment, acceptance, warranty, after-sales support, maintenance, spare parts, training, and OEM responsibility [FTA Narrow-Web Purchasing Guide]. Build one acceptance matrix that lists each requirement, its source in the specification, test method, evidence file, result, deviation number, responsible party, due date, and status. Classify deviations before the test: a critical failure blocks shipment, a major failure requires correction and successful rerun, while a minor open item may travel only under a signed closure plan.

Do not let attendance or partial payment silently equal acceptance. State whether the buyer signs as witness, grants conditional FAT release, or gives final acceptance, and allocate the cost of extra material, travel, and reruns. Payment, title, remedies, and risk transfer require review under the governing law.

FAT verifies the machine before shipment; SAT verifies installation, utilities, safety interfaces, environment, operators, site integration, and post-transport repeatability. Carry an agreed subset of FAT jobs into SAT. Document any difference in air, power, exhaust, network, or materials before assigning responsibility for a loss.

The evidence pack should retain job specifications, material IDs, plate and anilox records, configuration and software versions, calibration status, event and inspection logs, speed and waste records, labeled samples, training records, deviations, manuals, backups, and SAT prerequisites. Keep raw data with summaries so calculations are reproducible.

Connected service creates another acceptance boundary. The ISA/IEC 62443 series assigns security responsibilities across asset owners, product suppliers, integrators, and service providers for industrial automation and control systems [ISA/IEC 62443 Series]. If the press supports OEM remote access, the order should define authorization, named accounts, logging, session termination, patch and vulnerability handling, backups, data ownership, network prerequisites, and support after warranty. Applying these controls to a flexo press is a procurement inference from the industrial standard, not a printing-specific certification claim.

The final decision should preserve both risk and opportunity. A failed FAT can prevent an unsuitable machine from being shipped, but a transparent deviation process can also resolve correctable integration problems without destroying the project. A passed FAT reduces uncertainty; it does not prove lifetime uptime, future job performance, or service quality. Keep a controlled baseline for SAT and early production, then monitor the same accepted-output and waste definitions during ramp-up.

ACTION： Make FAT release conditional on a signed acceptance matrix, closed critical deviations, reproducible raw evidence, and an agreed SAT carryover plan.

Frequently Asked Questions

Q: Is maximum machine speed a valid FAT acceptance criterion?

A: Not by itself. Maximum speed is useful as a configuration boundary, but acceptance should measure compliant output, waste, recovery, and quality over an agreed job and elapsed test window.

Q: What is the most useful saleable-output formula?

A: Use accepted length / total elapsed test minutes, with setup, adjustment, stops, and changeover included when they belong to the contracted production scenario. Report first-pass yield and each waste category separately.

Q: Does ISO 12647-6 define the complete flexo press FAT?

A: No. It supports flexographic process control, color aims, responsibilities, and tolerances. The buyer must still define machine-specific speed, waste, register, changeover, curing, converting, and acceptance requirements.

Q: How many jobs should a flexographic press FAT include?

A: There is no universal number. Use the smallest matrix that represents normal work, a meaningful difficult case, and at least one commercial changeover. FTA wide-web purchasing guidance suggests two or three representative production jobs.

Q: Should FAT and SAT use the same tests?

A: Use a controlled subset of the same jobs, materials, quality limits, and output metrics. FAT verifies pre-shipment performance; SAT adds installation, utilities, site integration, operators, and transport-related risk.

Q: Who should set the register and waste limits?

A: The buyer and supplier should agree them before purchase using the buyer's product requirements, historical production data, customer tolerances, material behavior, and ordered machine configuration. Unsupported universal limits should be rejected.

Sources

• APR Narrow-Web Flexo Study, 2016. Historical US survey and interviews covering short runs, setup, and changeover loss.

• FTA Narrow-Web Press Selection Guide, accessed July 22, 2026. Buyer criteria for automation, control, waste, service, changeovers, inspection, and TCO.

• Weigang ZJR-350G/450G/650G Specifications, accessed July 22, 2026. Company-published model configuration and maximum-speed claims.

• FTA Narrow-Web Purchasing Guide, accessed July 22, 2026. Contract, FAT, training, maintenance, and OEM-support guidance.

• FTA Wide-Web Purchasing Guide, circa 2019; accessed July 22, 2026. Representative-job testing and purchase-contract guidance.

• ISO 12647-6:2020, published September 2020; confirmed 2025. Current international process-control standard for flexographic printing.

• FTA FIRST 7.0, 2022. Measurement, verification, fingerprinting, and process-control framework.

• FTA Press Automation Analysis, accessed July 22, 2026. Automation functions affecting setup, register, splicing, inspection, and reporting.

• FTA Ink-System Guidance, accessed July 22, 2026. Water-based and UV ink drying, curing, compatibility, and migration considerations.

• ASTM D5264-98(2019), updated August 15, 2019. Active abrasion-resistance practice for printed packaging.

• ASTM D3359-23, updated March 7, 2023. Tape-test scope and limitations for coating adhesion.

• ISA/IEC 62443 Series, accessed July 22, 2026. Industrial automation cybersecurity roles and lifecycle requirements.

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Page Title	How to Test Saleable Output in a Flexographic Printing Machine FAT
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Meta Description	Build a flexographic printing machine FAT that measures saleable output, register, waste, curing, changeovers, and contract acceptance.
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