Interesting Canon comment on "dye" fade resistance

Started Oct 22, 2012 | Discussions thread
Mark McCormick
Contributing MemberPosts: 769
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Re: Interesting Canon comment on "dye" fade resistance
In reply to detectorman, Oct 23, 2012

detectorman wrote:

See http://en.wikipedia.org/wiki/Arrhenius_plot -- you may want to google "Arrhenius plot" for some more examples.

Yes, the Arrhenius equation and various methods for implementing it in the evaluation of the thermal stability of photographic prints have been used for decades.  I've helped more than one researcher and even one well known testing laboratory implement this type of testing. The Arrhenius equation works well when densitometrically or colorimetrically tracking color fade changes for many imaging systems but not so well for others including dye-based inkjet prints (due to dye diffusion related color changes being confounded visually with thermally induced degradation of the dye molecules.

Getting back to the original claim in this thread of 300 year print longevity, this claim was probably derived from Arrhenius type tests of the media by itself and also by other methods to isolate the colorants and track their chemical degradation as a function of temperature. The percent fading allowance was probably a pretty liberal one as well.  However, Arrhenius tests are not appropriate for evaluating gas fade resistance, light fade resistance, humidity resistance, etc., all of which conspire over time along with thermally induced aging to degrade image quality.

kind regards,

Mark

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