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  1. #11

    Join Date
    Feb 2010
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    Montreal, Canada
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    I don't understand why one would need either Sulfuric or Hydrochloric acid in the darkroom. Other than in some old outdated formulas like Edwal Super 20, when would you ever need this stuff?

  2. #12
    Photo Engineer's Avatar
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    Apr 2005
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    Rochester, NY
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    Reversal B&W bleaches come to mind.

    Glass cleaner for glass plates is another.

    I'm sure I can think of more during the day!

    PE

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