Interview with Henry Wilhelm on print permanence
Background: among other things I'm a chemist and have also had an education in parts reliability. Failure rates of parts can be accelerated by testing at temperatures higher than the design temperature range, then corrected for normal use using Arrhenius' Law. The same testing acceleration could be done for temperature interactions with photo prints, then corrected back to "normal" conditions. The average digital photo guy prints his photo on good, not archival paper (is there such a thing as archival paper for inkjets?). The things that fade prints include light, chemical interactions with the paper, and possible chemical interactions with mounting materials or fingerprints. There is a lot of high end papers for inkjets, cotton base acid free. This stuff can all be tested in the short term by increasing temperature or (in the case of light) by using higher intensity light. While Wilhelm did his test with Epson inks versus generic inks, the same could be done with HP ink, Canon ink, toner, and so forth. Personal experience with Epson and HP jet inks is that they both fade in normal room light. I have an HP printer right now, mostly because they seem to last longer than Epson printers. No experience with Canon. You haven't used the high end inkjet materials, pigment ink greatly enhances life expectancy, past that of color photos. What you have seen is dye inks, without special swellable emulsion papers (this came from the Epson ink fiasco) dye inks just don't last. Most papers are not swellable, though dye prints will generally list the papers that will work best with their inks. We ahve 4 or 5 years old prints from a dye ink printer on swellable emulsion papers. HPs is HP Premium Photo paper, Epson's used to be called Epson Colorlife paper it wa savailable in gloss and luster finishes. Ilford has Gallerie Classic in gloss and luster for dye inks. Tom |
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