Re: Hexachrome, which train are you on?
Re: Hexachrome, which train are you on?
- Subject: Re: Hexachrome, which train are you on?
- From: Dan Reid <email@hidden>
- Date: Mon, 29 Apr 2002 16:04:13 -0600
on 4/29/02 3:08 PM, email@hidden at email@hidden wrote:
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In a message dated 4/29/02 4:49:03 PM, email@hidden writes:
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> So you want to proof Hexachrome with inkjet CMYK? Maybe I am missing
>
> something but there is a reason why people are looking towards Hexachrome
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> instead of CMYK for increased color vibrancy. The only printer that I guess
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> you could consider in-house is the Roland Hifi jet.
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>
Actually, I am proofing Hexachrome press files to a range of CMYK, CcMmYK and
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CMYKOG devices with assorted RIPs for comparison and testing.
Then you know which RIPs support Hexachrome ICC profiles? Great. I guess
your just challenging me. You must have Roland if printing CMYKOG, right? Or
are you using a DisplayMaker XII or something similar? I am interested in
how you are proofing CMYKOG with limited gamut CMYK or CcMmYK ink set-ups?
True, not every image will benefit from the Hexachrome but how are you
determining if the image will benefit using Hexachrome process. If the image
won't benefit from Hexachrome printing then why not just use CMYK instead of
trying to simulate six colors on a 4 color device?
>
The "something"
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that you are missing is that PressHexachrome is needed because PressCMYK is
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quite a limited gamut... for inkjets with their wider gamut the choice exists
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of getting a few more of the Pantone colors to proof accurately by using OG,
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or to get the smoother images by using the light C&M... few images actually
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need the OG for gamut enlargement. If you want both at once, then yes, an
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eight color device is your only choice.
I still don't understand how you can simulate six colors on a 4 color
device. The contract proofers that are certified by Pantone use Hifi 4/C
sheets to achieve a color gamut as large as the Hexachrome process. Inkjet
printers don't have a gamut as large as Hexachrome. If they did then why
bother with the Hexachrome anyways?
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> Maybe you should read the article before I start reiterating what I spent
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> a
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> bunch of time putting together. I don't give away the *secrets* for free,
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> sorry.
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I can't imagine there are too many *secrets* involved... <G>
Sure, if this was straightforward then we wouldn't be having this discussion
and I wouldn't writing articles about this stuff -- it would be understood
and accepted as we do for CMYK <g> :)
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
Color Imaging Solutions Provider
http://www.rpimaging.com | email@hidden
Toll Free: (866) RGB-CMYK [ 866-742-2695 ]
Local: (505) 471-4126
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