More than 4 color separations :
Additional ink colors are often added to make up for deficiencies in CMYK.
- Recall that black was added to CMY to make up for deficiencies in typical CMY pigments.Other carefully chosen colors can be used to extend the CMYK gamut.
- A larger set of primary colors can extend the process set to 6 or 7 colors. Examples are Pantone Hexachrome (orange and green), Scitex (red, green and blue) and Linotype Hell and others (orange, green, and violet or blue-violet).
- Hexachrome includes modified CMY in addition to the new colors. This gives close matches with 90% of PMS patches.
- Note that incremental benefit decreases with each additional color. TransCal’s HiFi ColorSeps support up to 18 colors, but a point of diminishing returns is reached with a much smaller number.
Color corrections - Color corrections are usually necessary at some stage of the process to
- correct for input device.
- correct for output devices.
- correct for poor originals.
- satisfy the customer.