Quick answer
Roll-width and slitting optimization reduces trim waste, changeovers, handling and avoidable inventory. The best parent roll is the one that produces the required finished widths with a practical slitting pattern while respecting core size, winding direction, roll diameter, splice limits and the converter’s equipment.
Start with a cut plan, not a single preferred width. List every finished width and forecast quantity, then test alternatives against the available parent width. A small improvement in trim can be outweighed by impractical roll weights, excessive slit counts or a pattern that complicates downstream converting.
Why width planning matters
Material utilisation affects paper cost, but operating time affects total cost too. A pattern with low trim may require frequent knife changes or create narrow residual rolls that are hard to use. Conversely, a slightly higher trim allowance can be justified if it delivers stable, higher-speed conversion.
Slitting optimization table
| Input | Include in the calculation |
|---|---|
| Finished width | tolerance, edge trim and slit count |
| Parent width | mill availability and manufacturing tolerance |
| Roll build | core ID, maximum OD and target roll weight |
| Machine limits | knife positions, minimum slit width, winding direction |
| Demand mix | quantities by SKU and repeat-order frequency |
What to send a supplier
Provide a width schedule, unit quantities, roll core, maximum outer diameter, roll-weight preference, winding direction, splice policy, end-use equipment and destination. Ask for the proposed slit plan and expected trim before approving the order.
Planning a paper or board order?
Send us your application, format and target specification.
Send your requirementsA better sourcing conversation
Treat the slit plan as part of the specification. It makes yield visible before production and avoids a dispute after delivery. For formats that also need coating, lamination or sheeting, define the process order and any width loss at each stage.
FAQ
Is the lowest trim plan always the best plan?
No. Select the lowest total operating cost after considering trim, changeovers, roll handling, residual stock and line stability.
What tolerance should I request?
Use the tolerance your converting equipment can reliably process, then agree it in writing with the supplier rather than assuming a universal value.