Knowledge -

Perforations are classified by bursting strength and type. The bursting strength is referred to as "ties per inch" or TPI. The perforations can be parallel or perpendicular to the fold of the flap. Perforations can be used anywhere on the envelope, but are generally located on the flap. They are most often parallel to the fold and are used to allow a section of an extended flap to be detached and used for some other purpose. See examples below:


"Ties Per Inch" or TPI:  Some of the TPI's available to use are 6,8, 10 and 12. A common size used is 8 TPI. The function of the perforation on the envelope will help determine the proper TPI to use. Be sure to discuss any special requirements with your vendor.


Back to Top

More Envelopes >>
Enter keywords to search
PrintingTips.Com Knowledge
Print Preparation
Print Products
Continuous Products
Direct Mail
Planning and Design
Component Development
Integrated Products
Single Sheet Products
Copy and Artwork Development
Direct Mail Services
Planning Guide
Integrated and Affixed
Laser Sheets
Single Sheet Products
Unit Sets
Features of Interest
Featured Ad
Terms of Use |  Privacy Policy |  Site Map |  Index |  Contact Us
Reproduction in whole or in part without written permission is strictly prohibited.
Copyright 2015 Tecstra Systems, All Rights Reserved, PrintingTips.Com

Knowledge and printing advice brought to you by

Printing Tips Home Customer Service Knowledge Glossary Printing Tips Home