i'm not convinced you'd see a dmax difference, but it seems to me the 130 gives you more texture and detail in the deep shadows ... so you can use more of that dmax. at least on the papers that respond well to it.
on fortezo i had a harder time telling the difference between amidol and 130 than between 130 and dektol. the amidol only got mixed when i had a real problem neg ... like an old one that was underexposed and needed all the separation that i could possibly squeeze out of the shadows. otherwise it made no difference.
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