Struggling with Black and White spots

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    Craig Tuffin
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    Ok, I’ve finally had a win! I’ll fill you all in just in case you experience this sometime.

    At the end of this my last day testing, I finally performed a bromine/mercury quadrat test. The result is an extremely informative image (ungilded plate of course). It ends up I was fuming with my bromine and developing far too long. Reducing my bromine times significantly (from 50 sec to 15 sec) totally removed the fogging. Those crazy and extremely annoying white spots are there, but only begin to appear at the 2 minute developing mark.

    At the end of the day the best time for fuming with bromine was 15 sec (after a first iodine of 15 sec) and the perfect developing time (@85 degrees Celsius) was 1 min. This was TODAY’s answer…tomorrow might be different.

    The next test….reducing the mercury temp to 70 degrees and developing longer. So there’s more to do, but I can sleep a bit better tonight regardless 🙂

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