Digital BW, The Print

Ernst, you have any idea why this German site is assigning "year" values that are all just about half of what Wilhelm is posting for all the inks?

Looks to me like they aren't testing behind glass? Regardless the longevity relationships between Epson, HP, and Fuji Chrystal Archive are remaining at about the same distance from each other in Aardenburg, Wilhelm, and this IE site. 

What is important in terms of light damage to a print is the dosage a print receives over it's lifetime, however long or short that may be... It is kind of like eating tuna. Tuna these days contains mercury. It won't kill you if you eat a small or moderate amount over a long period of time. But if you increase that dosage of mercury, even in a fairly short period of time, you can develop cancer and die. It's all about the accumulated dosage (megalux hours). 

j 








> In 2001? Wilhelm gave Fuji Crystal 60 years, later on 2004?  that
> dropped to 40 years.
> You will see shops give either the old or new numbers depending on their