> It has become silent out there when the topic PQ is mentioned today, especially sind phenidone seems to have poor keeping qualities in solution and due to the low acutance in comparison to MQ formulations.(posted 8322 days ago)Hmm...in the past five or so years we've seen four new Phenidone developers; Paterson FX-39 (Crawley) and Ilford DD-X are PQ types while Ilfosol-S is PQ/ascorbate and Kodak Xtol is P/ascorbate. FX-39 and Xtol are commonly noted for higher acutance than MQ developers; otoh in my experience the increased graininess of FX-39, Xtol and DD-X may not be a worthwhile tradeoff.
Gone, however, as you've noted, are the wild speed claims that used to accompany PQ developers; at most the manufacturers now claim only the film's rated speeds.