Response to Pyro & Toxicity

I wouldn't worry about the toxicity terribly. Wear rubber gloves at all times when handling the chemistry, and you should be fine. I've read that pyrogallol crystals are very dangerous for the lungs if the dust is breathed, so I recommend purchasing premixed chemistry (e.g. from Photographer's Formulary) rather than making your own from powder or mixing prepackaged powdered PMK.

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