Lemon juice would likely work. I've used baking powder. Baking powder has sodium bicarbonate and a mild acid of some kind. Its used to create carbon dioxide bubbles. In a solution the acid reacts with the sodium bicarbonate.
If you put enough baking powder in developer it lowers the pH enought to make it act like Dave Soemarko's LC1. There is usually some other ingredients like corn startch in the baking powder. This makes your developer solution into a white murky mess, but it works. You really need to wash the film. I used a water wash instead of stop bath for this. The speed of the film drops as more baking powder is added. The ASA of the film is about 1 when the developer has the pH to make a flat continuous tone negative. You can also get a mild reduction in contrast by using baking soda - this lowers the pH a bit - similar to using mildly diluted paper developer. The same effect can be done by adding a small volume of stop bath to the developer. It will lower the pH slightly. Gord On Wed, Dec 19, 2001 at 11:31:28AM -0500, R Duarte wrote: > Date: Wed, 19 Dec 2001 11:31:28 -0500 > From: R Duarte <ra...@rahji.com> > Subject: [pinhole-discussion] lowering developer pH with lemon juice? > To: pinhole-discussion@p at ??????? > > Anyone ever done it (to make the developer less active)? > > > _______________________________________________ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
