Multicolor test charts are available as PDF and TIFF files in Prinect Color Toolbox. They consist of two pages and are used for profiling Multicolor processes.
The example shown above shows the pages of the test chart for 6c CMYK-Orange-Green and can also be used for the combination CMYK-Red-Green. The patches in the top right corner show the colors for which the test chart is defined.
The additional colors for Multicolor are:
•Orange(O) or Red(R)
•Green(G)
•Blue(B) or Violet(V)
The following two-page test charts are available:
•5 colors (5 C): test charts (2x1229 color patches) for:
·CMYK+O or CMYK+R
·CMYK+G
·CMYK+V or CMYK+B
•6 colors (6 C): test charts (2x1407 color patches) for:
·CMYK+OG
·CMYK+OV
·CMYK+GV
•7 colors (7 C): test chart (2x1259 color patches) for CMYK+OGV or CMYK+RGB
•7 colors (7 C 260): Test chart (2x 1408 color patches) for CMYK+OGV
This test chart works with a total dot area of 260% and unlike "MC 7C" is no longer oriented solely to offset printing. That is why it is suited especially for creating profiles for Primefire or Labelfire. Restricting the total dot area facilitates enhanced scanning of the area used. For profile calculation, the dot area should not be set above 280-300%.
You will find a description of the procedure in Measuring and Evaluating Spot Colors.
You can also measure multicolor test charts with X-Rite i1-ISIS. In this case, however, you need special test charts.
Special 7c test charts for i1-ISIS