>From: VT
>QUOTE:
>ROCHESTER, N.Y., January 29 - Eastman Kodak Company today
>introduced the world's longest lasting inkjet photo paper - new
>KODAK Ultima ...
> photos printed on the paper will last for more than 100
>years in typical home display
You have to read between the lines with Kodak's longevity claims and be careful
about comparing them directly to the Wilhelm generated numbers, since Kodak is
testing to "typical home display" conditions, which are far less stringent than
the conditions Wilhelm uses.
Specifically Kodak assumes a much lower ambient light level, less than half of
what Wilhelm uses (which means their print life estimate gets cut by more than
half just for this parameter) and also they assume 30% loss of color density is
acceptable since the photos will still have meaning to a family with faded
colors, while Wilhelm assumes much more restrictive density loss (basically
when a trained observer can first see a difference between an unfaded and a
faded picture, around 7%).
Kodak also assumes less restrictive temperature and humidity numbers, but most
of the differences are explained by the lower ambient light assumptions and the
greater "acceptable" color density loss.
In the past, 100 years under Kodak's test condtions have correlated to about
18-22 years under Wilhelm's test conditions, which is what Epson and others are
using.
>this sounds amazing a paper that will make ANY ink last for over 100
>years?
You have to read the fine print carefully with the Kodak numbers
Bill