Homebrew PCBs

Terry wrote:

> and required a minumum purchase of a 5 gallon bucket of developer.
> Total cost about $250. 

I know LPI soldermask said to be the world most used, and sold for nine
times less than that, minimum order quantity 1Kg, alkaline carbonate
developer like dry film. 
But i still need to know for sure what is known in English as PMA
solvent...