TRUMATCH, the easy, accurate 4-color matching system in Adobe, Corel, Quark software for graphic design, has a free iPhone App with useful tools to specify your colors and estimate paper needs for your jobs.
A ready reference for TRUMATCH colors, where you can see the logic of the TRUMATCH numbering system, which relates to the amount of Hue/Saturation/Brightness. The index identifies the CMYK breaks of all TRUMATCH colors (over 2,000 colors plus 4-color greys). Note: you will see an RGB representation of printed CMYK on the iPhone, but for accurate 4-color matching, you must reference a printed TRUMATCH Colorfinder fanbook.
Use these dials to enter the TRUMATCH Numbers:
Automatic calculators for both text and cover weight paper stock. Just enter the Basis Weight plus the size of the sheet, and the M-Wgt. (weight of 1000 sheets) is displayed. Includes an automatic metric converter for both Basis Wgt. and
M-Wgt. Useful for commercial printers, print production managers, paper merchants, and graphic designers for estimating print jobs.