Digital BW, The Print

> "mcrib13" <edmondkim13@> wrote:
> 
> >... I just set up my Epson Workforce 1100 and EB4 inks ...



> 
> > It also gave me a warning in the text file that a soft proof could not be created because the rgb curves (raw file I'm assuming) werent in ascending order.


 <roark.paul@...> wrote:
> To be compatible with soft proofing, one of the R, G, B curves must go from 255 to 0 with at least some minimal positive slope throughout the range.  This usually is not the case with partitioned RGB curves. 

The Zip file now has both a "partitioned" ICC and curve for UPPM and also what I call a "sequential" ICC and curve.  What I do with these latter types of curves is start the inks sequentially, so that they are smoother than a straight grayscale, all ink firing equally, profile, but the curves have no negative slopes.  As such, the soft proofing works and they are also very tolerant of ink and paper batch differences.  The more fully partitioned curves and profiles are a bit smoother, but most will not see the difference in actual photos.  With many papers, including Ultra Premium Presentation Matte paper (UPPM), you can use a sequential curve for soft proofing even while you use more fully partitioned curve/icc for printing.  

Paul
www.PaulRoark.com