Response to XTOL keeps how long after mixing?

Photo Techniques, July/Aug 2001 issue reviewed this issue. The conclusion is D76 and XTOL are consistent performers with a storage life underestimated by product literature when mixed with distilled water and stored in glass, in the dark, with temperature extremes kept under control. XTOL will last 40 weeks under the test criteria and D-76 24 weeks. Exhaustion was determined to be 2/3 f/stop loss in the highlights. XTOL is thought to provide better sharpness and less grain than D-76.

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