Digital BW, The Print

I'm reviving this thread because it seems more appropriate to add this here rather start a new one.

I just sold a print that I quickly had to exchange for another.
The print had been on display in my gallery for about three years and when I opened the matte to look at it, I was shocked to see the paper had significantly yellowed where it was not covered by the matte. (I leave about 3/8 white paper showing around an image, the rest covered by matte.)

At first I thought it was Red River Aurora Natural, my standard paper until recently, and I went ballistic. I have sold many thousands of dollars of prints on this paper and the thought... well, you get the idea.

Then I remembered that this particular image would not print well on Aurora and that I had used Entrada Rag instead. I checked my records and sure enough; Entrada.

I experimented with Entrada only a short while. I remembered that though I prefer Natural papers, some of the Entrada I bought to play with was Bright. Comparing the yellowed Entrada print to a Natural Aurora sheet, the amount of yellowing was exactly (visually) the amount to be expected for OBA fading. So, for the time being, I am going to assume the problem was simply a loss of OBAs, unless someone here has other information(?). I hope not!

I never liked OBAs and this experience makes me like them even less. They are gone in only three years (possibly less, as I don't know when they faded during that period) and there is no way that obvious yellowing can make an artist look good when/if the collector opens that matte.

Thank god I did so little printing on these papers.