Re: Is this a scum dot?
Re: Is this a scum dot?
- Subject: Re: Is this a scum dot?
- From: bruce fraser <email@hidden>
- Date: Wed, 13 Nov 2002 17:40:45 -0800
At 2:55 PM -1000 11/13/02, Steven Kornreich wrote:
> Something odd is going on. I just took a new document in Adobe RGB 1998
and
converted to CMYK using some profiles I've made in ProfileMaker Pro and I
get a resulting value of 0/0/0/0.
Andrew Rodney
You are right I did the same test. I guess my problem is I am going from
scanner profile to printer profile.
I am not going from scanner profile to PhotoShop WS to Printer profile.
For doing art repro work which is all I do, I have been told by the german
guru's at bestcolor not to convert from scan profile to adobe ws even if I
have to do color correction. They say leave it in scanner profile ws.
What do you think?
I'm not Andrew, but I think german guru needs to step away from the crack pipe.
Scanner spaces are rarely gray-balanced or perceptually linear, and
are generally hard to edit in.
That said, going from scanner to output profile shouldn't produce a
scum dot -- I haven't seen Profilemaker CMYK profiles produce a scum
dot when used with either the Adobe or Apple CMMs. (The heidelberg
CMM often produces scum dots, though.)
What happens if you convert scanner to Lab, then Lab to CMYK? Does
white stay white throughout? If not, where does it stop being white?
(That would narrow it down some...)
Bruce
--
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