How do i design for a printer with more than 4 primaries

Some of the new digital printers work on more than 4 primary colors. For example the HP indigo series of digital printers boast with being able to produce ~98% of all pantone colors. This means that the gamut achieved by these printers are much larger than that of a standard process color device.

But how does one actually prepare a print to use this gamut fully? On desktop printers one is supposed to send a RGB file which is then converted to whatever the printer is using. But then I dont need to preview everything if I can just localy make proofs.

Since the color conversion isn’t a one to one kind of business how do i know what will happen, and should i care. Should i send cmyk or rgb and should i just trust my color engine to do a adequate job?

I supose i could just add spot color channels on the images and do a manual separation (been a while). I suppose I could just limit myself to a wide cmyk space. Or should I work in Lab space?

Answer

I found a HP resource for the output profile as I too was curious
Color Management Settings for HPIndigoInk250Photo.icc Profile
You treat the additional colour channels as you would for spot colour with traditional press – but there is a naming convention for the ‘plate’ to be recognised by the RIP. You will find further explanations on Youtube if you search for ‘Design for Indigo press’

Attribution
Source : Link , Question Author : joojaa , Answer Author : Mark Read

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