Re: EFI ColorProof XL v2.5+ Linearization
Re: EFI ColorProof XL v2.5+ Linearization
- Subject: Re: EFI ColorProof XL v2.5+ Linearization
- From: Roger Breton <email@hidden>
- Date: Mon, 03 Oct 2005 07:26:32 -0400
Hello Alex!
> Actually XF has two kind of ink limiting tools - total ink limit and ink
> limit per channel.
Right.
> And you can lay as much ink as you want.
Not so sure? But, OK. I'll listen...
> First of all, find a suitable TIC on "Step1" by yourself, don't rely on XF
> enginge, it's play safe. When you aim a mouse on a patch, you will see
> correspondent Lab values.
Yes, that's all I have been doing. I wish there was some expert mode of
using that program, like BEST 4.6.2.
> Go from top to bottom from left to right and find a sutable value for you.
The most suitable value is always the dakerst one. Which is never dark
enough for me :(
> Usually it'll be 50-100% greater than XF offers.
Yes, OK. But at 225% I can't have it take another 50-100%, that's too much
ink.
> The second thing - don't try to increase Light inks in Solids because you
> are decreasing color saturation of 100% patch! I'm using usually 1% Light in
> Solids.
AH! Ha! That's so poorly documented. That may very well be the key. Thank's.
> On step 2 go into Advanced settings. XF also play very safe here. Adjust
> Black channel to decrease L in shadows. Also you can adjust CMY to increase
> gammut.
OK. I will.
> I'm getting L aroun 8 on proofing gloss and semigloss papers with XF on
> Epson 4000.
Sound good.
> But it's almost impossible to get such L values with Ultrachrome Photo inks
> on some semimatt proofing papers (like Best 9150, it looks like matt coated
> paper, maybe your Fuji paper is a kind of such papers).
Yes, that is probably what is happening here with XF. But I can get L* of 8
even 7 with some other RIPs I'm using, on the same e4000 and UK inks!
> In my opinon it's
> not a problem of the RIP, it's a paper-ink interaction problem.
OK. Point taken.
> In such
> cases you can try Ultrachrom Matt black ink. It's possible to decrease Lmin
> up to 9-10 and to improve shadows.
All right, then.
> Best regards,
> Alexey Gribunin, UNIT Color Technologies,
THANK YOU!!
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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