Originally Posted by
Pere Casals
Perhaps problem is the thought that a sensitometric calibration explains all. It is true that sensitometry explains very well how a regular photographic process works, but with Pyro + EMA we are talking about compensation, and IMHO this is more complex, as (with EMA) response is also dependant on local exhaustion of developer and also on local bromide concentration that also influence local development. I mention the concepts I think I understand, but more can be there...
I was thinking that perhaps Pyro has an advantage for EMA, as density is partially built with stain then less bromide is generated for building the same density, with less risk of bromide streaks... just a thought. Also Xtol, for example (IIRC) is less prone to restrain development from byproducts... Perhaps that delicate equilibrium is needed to obtain a sound result....
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