Does Wilhelm do any testing on long-term effect of OBA's? I was under the impression they do not.
I think _some_ OBA's in the paper itself (not the coating) are probably OK. That's the approach Hahnemuhle has taken with Photo Rag, which by their admission does have OBA's (interestingly GMB profiling software does not detect OBA's in HPR though, so there must not be too much).
But from some of the feedback it sounds like EEF has more OBA's than most if not all of the fiber papers. I've not yet seen the paper myself but if it is brighter/cooler than the Harman paper that would definitely be too much for me, at least for monochrome images, as I felt the Harman paper was too cool.
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Wilhelm doesn't show the actual fade criteria in test results but OBA fading may influence the color balance so could still show in the years quoted.
The tests by Image Engineering of 50 papers and the current 3 color pigment inks available (so 150 combinations) as published in the Febr 2008 issue of ColorFoto has several criteria represented in a point system. Part of the test based on the ISO standards in development which can be checked at the Image Engineering pages.
Average Light Fading, Ozone Fading, Yellowing (in Delta , the last should cover the OBA fading as well. All together a number results for lifetime (Haltbarkeit in German).
That is next to the Weight, Sheet price, Waterproof number, Drying, Mechanical quality, Flatness, ending in a "Handhabung" category. And Neutrality, Saturation, Image Impression which should cover Image Quality.
Based on the results the papers are declared compatible or not compatible to the inkset and a quality number is added so you know the ranking of what is compatible.
Separate of the ink tests is a list of the 50 with the gloss grade measured and the whiteness in lab numbers, that will show OBA content as well.
Harman, Ilford, Fuji, Tetenal, Sihl, Epson, Canon, HP, etc but surprisingly no Hahnemuhle.
I think this is one of the best ways to show potential paper buyers what they can expect. It could be improved with some categories like Dmax (although saturation should give some indication) and more images to show the paper surface and ink impression like the RIT initiated web pages with that subject.
Ernst Dinkla
try: [a href=\"http://groups.yahoo.com/group/Wide_Inkjet_Printers/]http://groups.yahoo.com/group/Wide_Inkjet_Printers/[/url]