I recently bought some, Dektol still being on back order and my Multigrade developer replacement running out. Eco-Pro advertises itself as good with warm-tone papers and especially for toning.
My first trials were not rigorous but offer some initial indications. I used Ilford Warmtone Fiber semi-matte with two negatives, one a full-range portrait, the other a landscape including fairly dense clouds against a light sky. Development was 2 minutes around 72 degrees F.
Eco-Pro is a markedly softer-working developer, and gives a slightly warmer tone than Multigrade. The contrast is about 1/3 grade lower than Multigrade, in addition to which I had to add roughly 15% to the exposure to yield a comparable result in the print. This yielded a bit more of a shift in the mid-low values than in the high. I was trying to get comparable, not absolutely identical prints (just as well!) so that I could see toning differences, and I was trying to match the sky and clouds in one and the skin values in the other.
For toning, I used selenium, just topped-up with an ounce of fresh stock, which made it a bit stronger than 1:19 and therefore led me to a shorter toning time than I would normally use, but that's all relative, relatively speaking. I toned all prints for 4 1/2 minutes, giving a definite but not full toning. Viewing the dry prints, I see no obvious differences in the effect of the toner.
That's what I know for now.
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