Digital BW, The Print

In a message dated 7/25/02 8:08:33 AM, grdglass@... writes:

>I also hear that custom profiles improve these printers but I don't think
>a 
>profile can eliminate metamerism which is a function of the inks used.
 
It can't eliminate it, but a profile can be used to steer it; to make the 
print look good under a given light source, or to compromise for a range of 
light sources. Generally you give up on north light and fluorescent entirely, 
and focus of reducing daylight green, by increasing tungsten magenta to see 
if you can get a print that is tolerable throughout that range. If not, you 
narrow your range, and shoot for a tighter balance, under a narrower choice 
of lights, say tungsten and halogen. 

This can be accomplished with settings or sliders in the profiling software 
(the magenta>green slider in ProfilerPLUS and ProfilerPRO does a tolerable 
job of this for color work, at least) or for more exacting control, a profile 
editor can be used. I tweek the curves in DoctorPRO until I get the balance I 
want at all levels of gray without unintended crossovers, under the desired 
lighting.

C. David Tobie
Design Cooperative
CDTobie@...