Yahoo Groups archive

Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

RE: [Digital BW] ICC v. Transfer Function in Epson driver

2005-10-18 by Paul Roark

>Paul Roark wrote:
> > 
> > I printed a 21-step test file with the icc that was created with this
> > system, and the ramp is relatively dark with very compressed 90% - 100%
> > steps.  It's not what I'd like to see as a final density distribution.


Steve wrote:

> ...  Remember the colour
> management at work in showing the image on your display (no soft proof or
> anything) is doing an identical thing.  ...
> Adobe CMM is mapping the file black to your monitor's black point, 
> most likely with relative colormetric intent and
> black point compensation (so there is no clipping).  
> So this is exactly the
> same thing as what the printer ICC profile is doing 
> only the printer black is even worse.  
> So the point to remember is that you have been looking at
> this sort of scaling all the time for years.

It is about the same as what the monitor does, if not "corrected" with a
custom dot gain curve.  However, looking at if from the perspective of what
makes the best print, we are wasting precious grayscale.  If in 8 bit, our
256 steps is reduced to about 218 effective steps.  I'm not sure that is a
wise compromise at all. 

Paul
www.PaulRoark.com

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.