Re: Press Simulation
Re: Press Simulation
- Subject: Re: Press Simulation
- From: Terry Wyse <email@hidden>
- Date: Thu, 24 Jul 2003 14:29:10 -0400
on 7/24/03 11:24 AM, David Marshall wrote:
>
I have recently implemented a CMS into my CMYK workflow. I have created
>
profiles for my monitor, Epson ink jet, conventional Cromalin and offset
>
litho press. Can you guide me as to how I can use these profiles so that my
>
ink jet proof and cromalin will simulate what I print on the offset litho
>
press.
The Good News:
There are a number of good proofing RIPs out there that will allow you to
simulate your press conditions on an inkjet device. There's Best Colorproof
(Mac and PC) and ColorBurst (Mac and PC) to name a couple. Depending on your
"front-end" system (Rampage, Prinergy, etc.) there may be options there as
well. Keep in mind that each has it's own calibration procedure so you'll
likely have to create a new inkjet profile (your press/Cromalin profiles
should be fine).
If you can print all your work directly out of Adobe apps, you can use their
built-in color management capabilities. In simplest terms, it's simply a
matter of specifying your press profile as your source/document profile and
the inkjet profile as the destination/output profile. I'm leaving out A LOT
of details here but that's the basics.
The Bad News:
Unfortunately there's no EASY way of getting your Cromalin proof to simulate
your press. It's assumed your Cromalin is already in the targeted
"pressCMYK" space so I'm not so sure you'd even WANT to do this. The bottom
line is you'll end up preparing one set of CMYK values for the Cromalin and
a completely different set of CMYK values for the final press output. You
really need to ask yourself if it's a SAFE thing to do to show one set of
CMYK values on the Cromalin proof to your customer and then print entirely
DIFFERENT CMYK values on press to achieve the same relative color match. It
can be done but it's a scary proposition in my book.
I assume you're outputting film for both Cromalin and press/plates. To
accomplish what you're asking would mean running your CMYK output data
through two different CMS workflows (something like Gretag's iQueue could do
this) and create two separate sets of film, one for the Cromalin proof and
one for the press.
Your BEST bet would be to manipulate your Cromalin system, adjusting toner
density/dot gain/gray balance, to simulate your press as best as you can.
Once the Cromalin system can simulate your press using the SAME set of film,
you can avoid the nastiness of needing to sets of film and profiles.
Hope that starts to answer your question.
Terry
--
__________________________________
WyseConsul
Color Management Consulting
v 704.843.0858
e email@hidden
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