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I think you're on to something here, Paul. I've done some research and I'm quite sure that Ilford Classic (fka IV) MG glossy has OBAs. Someone suggested I look at a print on that paper and a carbon print of the same photo on my Premier Art FineArt paper under sunlight. I held them side by side and I couldn't see any difference. The gallery just installed these LED lights only a few weeks ago. I wonder if other artists will have issues.

In the gallery, as you say it must be the LED lightening up the OBAs in the Ilford FB paper. What I'm more concerned with is the discrepancy between the two prints' paper and mat board. The difference in the blacks between the two is hardly noticeable, at least to my relatively untrained eye.

I've still got 1/2 pint of Eboni 1.0 so I've decided to stick with the original Carbon-6 inkset's Y dilution till I finish that Eboni. Maybe by that time the Canon ink will be in more affordable quantities. I do mix my own C6b - with an Ohaus digital scale that's accurate to .1 gm. I've got the open source mix-your-own procedure to where I'm comfortable with that procedure. I already had some Photo-Flo and LFN on hand from my darkroom days, and I get glycerine from my local CVS.

Thanks for link to your fade test setup. I'm looking forward to your results.

Paul

Digital BW, The Print

Re: LED lighting in art gallery - some issues

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