In brief
A roll price is one part of a quotation. Record the quoted item, commercial basis and verified net-film mass before comparing figures.
Price per net kilogram is a normalisation step, not proof of applied cost, availability, suitability or supplier performance.
Start with the exact quote
Record the exact supplier reference, quote date and validity, currency, VAT basis, stated delivery terms, surcharges and minimum order quantity. Keep the original document with the record.
Do not infer net-film mass from gross weight, dimensions or a similar item. If a field cannot be verified from the quote or technical documentation, mark it UNKNOWN.
Separate net film, core and gross mass
Net-film mass, core mass and gross roll mass describe different things. Record each term as the source defines it and retain the supporting document. Packaging and pallet mass may matter for receiving, but should not be silently treated as film.
If two quotations use different units, delivery points or validity periods, pause the comparison until the stated basis is clear.
- Delivered price per verified net kg = delivered unit price ÷ verified net film kg
- Keep currency, delivery scope and VAT treatment visible beside the calculation
- Use a symbolic example such as £X ÷ Y kg; do not present an assumed market price as a benchmark
Keep applied cost as a separate question
A normalised material figure does not establish applied film mass, rewraps, breaks, handling, downtime, load security or total operating cost. Those need their own controlled, site-owned records.
Measure representative load families with documented assumptions before considering any applied-cost scenario. Do not turn a theoretical calculation into a savings or performance claim.
Keep a buyer-owned audit trail
Save the dated quote and technical documentation with the worksheet. If an item, quote or commercial term changes, create a new entry rather than overwriting the old basis.
This preserves a traceable comparison without ranking a supplier or making a price, stock, delivery or product promise.
| Measure | Useful for | Limitation |
|---|---|---|
| Price per roll | Ordering and invoice checks | Does not show the commercial or net-film basis |
| Price per net kg | Normalising stated quotation inputs | Does not measure applied use or process outcome |
| Cost per pallet | A later site-owned scenario | Requires a controlled, representative usage baseline |
Practical checklist
- Keep the dated source document and exact item reference
- Record verified net-film, core and gross mass separately
- Align currency, delivery scope, VAT basis and validity period
- Mark unknown fields rather than deriving them from assumptions
- Measure applied use separately by representative load family