No. It is there to keep the Metol from oxidizing before the rest of the sulphite is added. I do not know if it really makes any difference, but I do that. The amount of sulphite I add is about 1/8 to 1/4 teaspoon (not measured) when the amount of sulfite the formula requires is 100 gm.Metol does not dissolve well in sodium sulfite solution so it should be put up separately. AFAIK, the other ingredients can be combined. Richard KnoppowIsn't the old advice: weight out all the sulphite you need, put from that amount a pinch in the water volume you need, than add all the metol and stir.. The reasoning being that you need a tiny bit of sulphite to get the metol into solution more easily?
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