Response to Speed increasing with 2-bath developers

I use Diafine with TXP 4x5 @ 400 and love it. I do use cold light printing so try pulling a print and see what you think of each side by side. Two baths typically only process the highlights so far and are exhausted so there is no danger of blocked highlights and the shadows are teaming with detail. This being said, the contrast of the negative is usually just right for near straight prints. Diafine has higher acutance than Divided D76 but the DD76 is extremely fine grain so I have both in my darkroom for different situations... love them both. If you need to push with Diafine, it is ok at 1600 as stated on the box but you start to loose shadow detail. If you want to really push, Acufine works better than Diafine.

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