Digital BW, The Print

john schreef:
> 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

The owner says his lamps have a better spectrum but I guess the
arbitrary ratio was set like that :-). You wouldn't set up a new testing
facility and then get years results that are longer than Wilhelm's. 
Doesn't look professional.

It doesn't matter what years, the results from the different labs at 
least show correlation and Mark's method looks like the best one.

Ever thought about the Tuna's health in the first place?  Would be 
better of course if that poisoning showed the symptoms earlier, could 
spare a lot of fish that now is embedded in ice on Tokyo's market.


-- 
Met vriendelijke groeten,   Ernst


Dinkla Gallery Canvas Wrap Actions

|      Dinkla Grafische Techniek      |
|         www.pigment-print.com        |
|                 ( unvollendet )                 |