Digital BW, The Print

Thanks for your reply.  As it turns out, I'm still using photoshop 
6.  However, the problem does seem to be in the conversion from 
grayscale to RGB.  If I create a gradient in an AdobeRGB file and 
then print it without doing any conversions, it prints perfectly--no 
posterizing.  (Interestingly, conversions from RGB to grayscale seem 
to cause similar problems.)  I suppose I'll just have to work 
exclusively with RGB files.  Too bad: It's a waste of space and time, 
and it makes softproofing much less convenient.  Maybe I'll try using 
the Microsoft ICM conversion engine, though I don't suppose it will 
be any better than the Adobe engine.  It's curious that other's 
haven't encountered this problem.  I have to wonder whether I'm not 
doing something else wrong.

McKenzie
       
--- In DigitalBlackandWhiteThePrint@y..., "jimhayes361" 
<jimhayes@j...> wrote:
> --- In DigitalBlackandWhiteThePrint@y..., "mckenzielamb" 
> <mckenzielamb@h...> wrote:
> > I'm printing with vm inks on an 870 from a windows machine, and 
I'm 
> > using Paul's 870 curves.  For the most part, my prints have been 
> > excellent, but two prints have shown fairly serious posterizing 
> > toward the dark end of the spectrum. 
> 
> If you are using PS7 instead of PS6, just to rule out the greyscale 
> PS6-->7 bug that was just discussed a couple of days ago, please 
> search for that topic by searching for "print change confirmed" or 
the 
> like...it is a fairly detailed and long thread, I don't think you 
can 
> miss it. I even got posterization- and worse- in PS7 with Adobe98 
> conversion, though it was nowhere as bad as with the sRGB 
conversion.
> 
> You see, PS7 converts files differently then PS6 does. I notice 
> posterization in a very dark file, but when using PS6 it goes away. 
It 
> is lessened by using Adobe98  in PS7 instaed of sRGB, but I still 
have 
> some odd problems.
> Jim H.