800-537-2514 / 918-835-6510
Serious Solutions to On-press Perforating, Scoring and
Die-cutting Problems

Guidelines for positioning the offset perforating rules should be clearly placed on the plates. Before beginning, make sure you can position the rule in precise accordance with the artwork. Be certain you also have the appropriate type and size of rule to complete the job correctly.

Problem

Paper is sticking to teeth on the perf

Possible Solution

Grippers need to be adjusted or replaced. Lay a piece of clear tape over the perf. Possibly apply a silicone spray to the rule teeth.

Problem

Perf is not perforating as desired

Possible Solution

Add pressure or change rule to a special high product.

Problem

Perf is slitting instead of perforating the paper

Possible Solution

Reduce pressure, try changing to a special low product, or overlay the rule with a piece of clear film tape.

Problem

Rule is not perforating at all

Possible Solution

Use a good hard 3- to 4-ply non-compressible blanket. Check the pressure.Reverse or use back side of blanket if possible. Does this particular press have springloaded cylinders designed to release under pressure as a safety precaution?

Problem

Teeth are bending or breaking off

Possible Solution

Reduce pressure and make sure the correct height of perf for the stock is being used.

Problem

Perforation is straying from guidelines

Possible Solution

Reduce pressure. Try using a 1/2” to 3/4” masking tape to overlay the perf (especially in high-speed web operations that generate heat).

Problem

Indentation or shoulder mark in paper is appearing adjacent to the perforated line

Possible Solution

Back off the pressure. Try a center-mounted rule to distribute pressure evenly to both sides of rule.

Problem

None of the above

Possible Solution

Call our toll-free number: 1-800-537-2514 for experienced technical assistance.