Colors of Our World

• SWOP, The Specifications for Web Offset Publications

• GRACoL, The General Requirements for Applications in Commercial Offset Lithography

• SNAP, The Specifications for Non-Heatset Advertising Printing, and

• PROP, Prepress Requirements for Offset Packaging.

SWOP, by far the most widely accepted and mature specification, is currently in its eighth edition. It includes specifications for separation films; inks, substrates, and dot gain for proofs; and inks, substrates, density, and dot gain for production printing. The SWOP spec has recently been expanded to include discussions of best practices for print production.