I visited a central California cemetary over the weekend and noticed more than a few headstones and markers had photos of the deceased on them. These seemed to date mostly from 1910 to 1928. The photos appeared to be printed (if that's th e right word) on highly polished white porcelin-like material. The image was fu ll tone and sharp. The image tone was in all cases similar to what you get with a really solid selenium toner on conventional materials. (i.e., way beyond egg plant to purple) What was remarkable was the fact that these "prints" all look ed very good. Not faded in the least despite 80 years of exposure to the elemen ts. If anybody knows, how did they do this back then? Thanks for any answers.
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