Creep Calculator

What it does

• Creep is the cumulative shift of inner pages in a folded section.
• The shift grows with page count and paper caliper.
• Compensating creep keeps the fore-edge from stepping.

How to use it

1. Apply creep toward the centre of the signature, not to the outer pages.
2. A 16-page section on 100 gsm stock usually creeps less than a 32-page section.
3. Creep changes the trim, so confirm the allowance before the first cut.
4. Record the compensation on the imposition so a reprint repeats it.

Safety notes

• Do not compensate by trimming a finished book; the pages are already bound.
• If the calculated creep is larger than the safety margin, reduce the section size.