Knowledge Base

/Knowledge Base

Welcome to the Recycled Paper Printing, Inc. Knowledge Base.

Here you will find an ever-expanding repository of information related to printing, paper and print design.

Choose one of the categories to the right to narrow the options or search the Knowledge Base.

What’s the difference between RGB and CMYK?

Knowledge Base, Q&A|

RGB and CMYK both describe the primary colors used in full-color reproduction systems. […]

Envelope Guide

Concepts, Knowledge Base|

Envelopes come in a vast array of styles that are categorized according to function and structure. […]

Folding Guide

Concepts, Knowledge Base|

With all the possibilities available for folded pieces, it’s important to plan your project carefully. This guide provides vital information to help you plan your folded piece. […]

FSM: The Rules for Folded Self-Mailers

Knowledge Base, Publications|

What designers need to know, presented in a concise, step-by-step manner — you get only the info you need to help reduce mail piece damage and avoid costly charges at the Post Office. […]


Concepts, Knowledge Base|

Halftoning is a method of printing shades of tone using a single color ink. By varying the size or density of dots, the eye can see a shade somewhere between the solid color and the color of the background paper. […]

Print Design Essentials eBook

Knowledge Base, Publications|

What every graphic designer (and those thrust into the role) need to know to achieve the best results on press. […]