Name the exact application
State retention and drainage, dual-system component or dry-strength duty.
Include the paper grade and current limitation.
Describe the furnish
Provide fiber mix, fines, filler type and loading, broke, conductivity, pH, temperature and charge data.
Report normal and upset windows.
List wet-end chemistry
Identify coagulant, fixative, starch, sizing, retention polymer, microparticle and addition sequence.
Include current product and active addition.
Describe the machine path
Provide stock consistency, addition point, dilution, contact, fan pump, screens, headbox and speed.
Note known shear or mixing constraints.
Define acceptance methods
Name retention, ash, drainage, formation, white-water and paper-property tests and decision limits.
Separate laboratory screening from final machine approval.
Request traceable samples
Require product code, preparation guidance, current COA, SDS and sample lot identity.
Link quotation and production supply to the approved code.
State commercial scope
Add sample and monthly quantity, bag, pallet, marking, storage, destination, Incoterm and timing.
Compare delivered cost on a consistent active and use-rate basis.
Set change control
Ask how material product changes are communicated and how incoming lots are checked.
Define who may approve a deviation from the tested identity.
Machine-trial interpretation and release record
A useful paper-machine decision record connects the product question to a defined furnish and grade. Record fiber mix, fines, filler, broke, pH, conductivity, temperature, charge demand and the complete wet-end additive sequence. Identify the current limitation and the measurement that will decide the trial. This context prevents a visually attractive laboratory result from being mistaken for a production-ready recommendation.
Compare a blank, the current program and coded candidates at equal active addition. Keep stock consistency, dilution water, polymer aging, addition order, mixing energy and elapsed time consistent. Measure the relevant combination of total and ash retention, drainage, white-water solids, formation and sheet properties. Repetition matters when furnish variability is large, and an apparent improvement should remain visible against the reference before scale-up.
The machine review should trace polymer from make-down to the headbox or selected sheet-strength addition point. Note feeder calibration, stock concentration, aging, dilution, injection hardware, contact time, fan-pump and screen shear. A chemistry that works only under gentle beaker mixing may not survive the approach-flow path. Conversely, poor wetting or a blocked dosing line can make a suitable grade appear ineffective.
Approve an operating window, not a universal dose. State the furnish, paper grade, test methods and acceptable balance among retention, drainage, formation, runnability and finished-paper quality. Link the approved sample code to its quotation, COA, SDS, packaging and receiving checks. Revalidate after meaningful changes in furnish, filler, wet-end chemistry, addition point, machine speed or supplied product identity.
Plan the machine trial before the sample arrives. Define baseline duration, sampling points, laboratory methods, operator observations, stabilization time and stop conditions. Hold other additives steady when practical, and document every unavoidable process change. Review white water, press behavior, deposits, broke and finished-paper tests beside the primary metric. A trial succeeds only when the total process and quality balance remains acceptable, not when one retention or drainage reading briefly reaches a peak.
Close the work with a release sheet that production, quality and purchasing can all use. Include the accepted product code, active addition range, preparation recipe, addition point, monitored signals and corrective actions. Add the representative furnish window and approval date. This lets later lots be checked against the same evidence and prevents a result from being separated from the conditions that created it.