Perfection XR-1

Hi, I may have posted this question on this board in the past, I really don't remember. Does anyone know the formula for Perfection XR-1 film developer? The company in California has long since gone out of business, but the safety notice in the instructions may have a key to the ingredients. It lists Phenidone, Metol and Hydroquinone as ingredients. I only have a couple of packets left and I'd like to be able to mix some up when they're gone.

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