Back in the late 70's while working as a photo-chemist it was suggested that I might make & sell Photochemistry. At that point we had a very practical Monobath which we'd devised for a specialist application but it also worked extremely well with both films & papers.
These days it's a bit late to think about entering the market, the number of manufacturers greatly out-strips the number of film/paper manufacturers by a huge margin
But there's still a niche for specialist chemistry, and perhaps there's a few things up my sleeve, however they would go out through existing suppliers. I've no wish to be a Capitalist