Response to Shelf life of XTOL

I have used one shot XTOL for 2 years in the one 1itre packets. Out of 10 - 15 litres only one roll of film was thin. For medium format in FP-4, Tri-X, or Verichrome, 1:2 dilution produces a 1/2 stop speed increase, full tonality and improved sharpness. I mix a batch with distilled water every 3 months so I can't comment on long term storage. Skin tones in TX-135 may look better in D-76 or straight XTOL vs XTOL diluted 1:2 or 1:1. FP-4 however is very nice in XTOL 1:1.

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