I am looking at the feasibility of a potions factory system. Perhaps one that focuses solely on healing potions. They need to be available and relatively easy to get. Given a world where magic is rare or moderately rare, how can this work logically? Value of the potion would be high for a commoner, but not difficult for most adventurers. (Basically the equivalent of 50 gold, in D&D terms). I've been thinking about also having weaker potions out there that heal less than the standard for a cheaper price. There will be more casters in the geographic area where the potions are being made, but I don't want to count on casters randomly coming in and helping out. The only thing I can think of is a magical "blue print" made by a magic user which can then by used by non-magic users a limited amount of times.
EDIT CLARIFICATION: Alchemy is involved, but it is essentially a liquid version of a spell, so magical energy needs to be part of the process. The stuff closes wounds instantly, and heals them. Ingredients/ingredient rareness I can worry about separately, I am just looking for the answer to industrializing when the magic to make it is rare.