Response to Ammonium thiosulfate teaspoon amount for TF-3?

I can't help the teaspool measure part. Ammonium thiosulfate is said to be unstable in dry form, so I usually keep 60% solution. The odor can be reduced by removing sodium metaborate and adding boric acid (and some borax if needed - I don't use borax). If you don't mind a bit of acetic acid smell, you can use sodium acetate buffer. Unless you need absolutely high pH to keep the stain from staining developer, target at pH of 6 to 7. For quick efficient wash and negative stability, you don't have to go too alkaline. But before trying all these, I recommend finding a decent scale - check out www.balances.com. Also, decent sets of pH test strips are handy and good for sanity check before using the solution too (one for pH of 4 to 8 range for fixers and another for pH of 8 to 12 for developers would be good).

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