While I checked the dates of first OBA and barite use in photo papers I came across an initiative of the Getty Foundation:
http://www.getty.edu/conservation/our_projects/science/photocon/photocon_wanted.htmlSo if you still have old film and paper packages lying around, you know what can be done with them. Related research articles can be found through that link too.
What I miss is a similar initiative for digital photography. Sure analogue photography is heading for bicentennial but digital prints are close to 30 years now. Some papers and inks are no longer produced but enough will still be stored by users and distributors that will be thrown away in the next decades.
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Met vriendelijke groet, Ernst Dinkla
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmDecember 2012: 500+ inkjet media paper white spectral plots.
