Digital BW, The Print

Many thanks for the info, it was just what I was looking for, just 
need to find a spare couple of hours to create a curve.  Hmm now 
where did I leave the kids playing? :)

Gareth

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "seaford6" 
<gbphoto@o...> wrote:
> Gareth,
> 
> I have a similar problem using the MIS variable mix quadtones with 
> Somerset Enhanced Satin paper. The mid tones are blocked.  
> 
> Paul Roake suggested adjusting the curve by using a transfer 
> function.  This is available in the full version Photoshop and MIS 
> have a link to Jerry Nevins Tutorial.
> 
> http://www.jnevins.com/transferfunctioncurve.htm
> 
> Regards
> 
> Garry Bisshopp
> 
> 
> 
> --- 
> 
> In DigitalBlackandWhiteThePrint@yahoogroups.com, "garethlock4472" 
> <g.loc@o...> wrote:
> > In reply to my previous message re: curves vs profiles I decided 
to 
> > do some experimenting! 
> > 
> > I set up my monitor using Adobe Gamme several times and got 
> something 
> > which looked right however for me to see the full 90-100% in 1% 
> > segments I had to have the gamma turned right up which blew 
> > everything else out and I did not get true blacks (more of this 
> > later).
> > 
> > I have just printed out a great test chart which has 0-100% in 5% 
> > steps, 1-10% and 90-100% steps in 1%, and 0-10% and 90 to 100% in 
> 2% 
> > steps.  When printed without a curve the mid-tones are blocked up 
> and 
> > I cannot even get past 90% without seeing pure black.  The NCA-
gs1 
> > curve allows me to get even tones all the way through to 94% and 
> then 
> > I cannot discriminate any further.  The NCA-nc1 curve doesn't 
quite 
> > get as far 92% before blacking out.  
> > 
> > I can see how the GS curve works because it is one channel (not 
> going 
> > to even attempt the colour curves!).  How easy is it to modify 
this 
> > curve to allow the 94-99% be lightened to see the delineation 
> between 
> > the sections?  The gs1 curve has 16 points including 0 and 255 
and 
> 5 
> > points within the first quarter of the graph; these obviously do 
> not 
> > match linear steps.  When you are modifying something which is 
> tucked 
> > right in the bottom left of the graph things don't seem to move 
on 
> > the screen.  It doesn't help that on screen I cannot see past 92% 
> > anyway!
> > 
> > Any ideas from the collective wisdom?
> > 
> > Gareth
> > 
> > PS The fianl print settings were:
> > 
> > Colour Space Assigned: AdobeRGB 1998
> > Source Space: Adobe 98
> > Print Space: Same as source (When using the Epson 1270 profile it 
> is 
> > pure black from 85%!)
> > Paper Setting: HWM
> > Dpi: 1440
> > NCA in Driver