From memory only, the classic lith developer is Hydroquinone and Potassium Hydroxide only. Something like 20gms of Hydroquinone and 30gms of Potassium hydroxide to a litre of water, but don't quote me on that. The formula can probably be put together quite sloppily, since exposure and development have to be found by trial and error with lith materials anyway.(posted 8641 days ago)