Datacolor User to User Support Group.

Hi, 

Welcome back and thanks for your report on Zeta HP printers.

You are correct of course, as I have proved to myself by measuring 
max density of a step wedge printed through a profile with black 
point checked.  My question.  Most color gurus I have read almost 
always suggest black point compensation be checked.  Why?  If I print 
with perceptual it doesn't seem to make a difference.  (I have heard 
that BPC doesn't apply to perceptual rendering, but it is there to be 
checked or unchecked.)  Would appreciate your explanation about these 
issues.

Paul

> PrintFIX PRO profiles are RGB to RGB, so blacks in images are 
defined as 0, 
> 0, 0. Any changes via Black Point Compensation can only make this 
number 
> higher, not lower. So BPC can weaken your blacks, but it can't 
strengthen them. Keep 
> that in mind when choosing it!
> 
> C. David Tobie
> Product Technology Manager
> ColorVision Business Unit
> Datacolor Inc.
> CDTobie@...
> www.colorvision.com
>