Response to Amidol differences???

Dan I would say call photographers formulary and ask what kind of grade is their Amidol. In chemistry we have different types of grades depending on the application. For example there is technical grade, indsutrial grade etc. Technical being the more pure, I have also seen some chemicals labeled photography grade, but this was many years ago I am unsure if this is still in use. Being the the food and dye industries are using amidol as a colorant, I would stay away from this if you did not like the red kind. Hope this helped.

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