Do not assume direct mass-for-mass replacement
PAM and starch have different product forms and roles within the wet end. An offer to reduce starch by adding dry-strength PAM needs a defined starting program and a controlled comparison. State the current starch type, preparation, addition and paper-property limitation before requesting a replacement rate.
Confirm the actual proposed PAM identity and active basis. A supplier's generic substitution claim does not establish the result on the mill's furnish. Keep retention or sizing effects distinct from the primary dry-strength objective so an apparent saving does not conceal another functional change.
Test combinations in a transparent sequence
Begin with the current program as the reference and introduce the PAM at documented additions. Evaluate any subsequent starch change as a separate condition, keeping other variables stable where practical. Use representative stock and consistent sheet preparation, conditioning and quality tests.
Record total chemical use, preparation and addition order for every combination. Do not compare the best candidate combination with an artificially weak reference. If a new fixative or retention adjustment is needed, show its contribution and cost instead of pricing the PAM in isolation.
Protect the machine and accepted grade
Measure target strength with drainage, retention, formation and other grade-critical properties. Confirm the laboratory shortlist on the actual machine and record runnability and off-grade observations. Lower starch consumption is not a successful result if it creates unacceptable paper or additional operating intervention.
Keep basis weight, moisture and test direction comparable. A different sheet or production setting can mimic a strength benefit. Proposed fibre or energy savings should remain unpriced until the mill has demonstrated them under the relevant quality and operating conditions.
Quote the accepted combination, not an isolated ingredient
Compare delivered PAM and starch expenditure on one agreed production basis, with preparation and measured handling implications where relevant. Specify what trial support, equipment or service is included. Do not use equal product mass as proof of equal activity or assume an unverified active fraction.
Link the accepted component identities, additions and sequence to the purchase record. Revisit approval after material starch, furnish or process changes. A combined-program purchase can be justified by repeatable mill evidence without claiming that PAM universally replaces starch or guarantees lower cost.
Connect qualification to the order
Keep the related operating qualification with the purchase record. Further checks include Paper PAM Purchase: Check Compatibility with Starch and Sizing Before Approval and Dry-Strength PAM Bids: Compare Sheet Tests on One Conditioning and Basis-Weight Basis.
Request coded material through the papermaking PAM sample and quotation brief. Include paper grade, furnish, additive sequence, preparation limits, acceptance method, quantity and destination. Separate demonstrated results from conditions still awaiting a trial.