Digital BW, The Print

> Paul wrote
> The warming is the issue that I am concerned with the most, and that
> differential is significant.


I have just re-reviewed some natural light fade tests of piezo inks
on a variety of papers. The prints are not protected by glass
(except the window in the house) and are located on an east wall
in an alcove. The prints get much bright reflected light
from off white walls and ceiling but no direct sunlight. Tests started
August 2001.

The location represents a very foolish but possible
location for displaying prints.

Without a densitometer I can only report what I see.

Compared with all dark stored prints the warming has created
a significant RELATIVE change in density between the 100% patch
and the 95% patch on all papers.

(for Mike K - this helps greatly to separate out
those compressed dark tones)  ;-))

The only paper that fared well is Waterford DI CP 185
which warmed less than uncoated Somerset Velvet.
Somerset Velvet lost overall density but did somewhat better
on the RELATIVE loss between 100% and 95%.

All the other papers lost enough RELATIVE density
in the 95% - 85% range to affect the image including:
Photo Rag 188 gsm
Museo
Legion Photo Matt
BC Eclipse Satine (not toooo bad)
Somerset Enhanced
Somerset Enhanced Textured
Concord Rag
Somerset Enhanced Velvet

YMMV.

Thanks
Bob Obenland