Acufine Diafine 2 Bath Black & White Film Developer Concentrate, Makes 1 Gal. of Solution

I have been using this 2-bath developer since about 1970. Two packages of dry developer are included, A and B, which are separately mixed with distilled water(preferred) or bottled purified water and each solution is then put into one gallon dark-colored containers clearly marked as Diafine A and Diafine B. Three minutes in each bath with minimal shaking or tank inversions are all that is required, if you follow the directions precisely. Solution A is returned to container A before using Solution B; then Solution B is returned to its container. Never combine A and B in the same storage containers or jugs. The two Diafine jugs should be kept in a dark place between 68 degrees F and 75 degrees F. The temperature of the development process is not critical if within the desired range. With 35 mm and 220/120 B&W film, the brightness and contrast levels can vary from shot to shot - Diafine automatically compensates for the differences in ranges of exposure and contrast if you follow the directions. If the containers are sealed between uses, and you used distilled water to mix the 2 solutions, the useful life of Diafine can be years. Each film developing container typically requires one liter or less, so a gallon of A and of B should go a long way.

I have had good results with this developer with all BW films. Not temp fussy and easy to use. I try to get all the chemicals to the same temperature by putting them into a bath before use. It's nice to be able to develop different speeds of film at the same time.

I have loved DiaFine for decades. it's my only film developer now. No, it's not good for manipulations involving exposure VS development time. That's more than offset by the convenience of mixing film stocks in the same batch. Shooting so much less film now vs when I was working...it's perfect for my needs.

Follow the instructions on the box, shoot at the indicated speed on the diafine box for your film, and the results are sharp B&W photos. A little gray but this is good for scanning since you can adjust in P/S.This developer is idiot proof, very easy and lasts a long time. Reusable.

I love this stuff.You don't really have to worry about time or temp,Please note I tend to use it for 120 and 4x5, so grain isn't an issue for me

Brilliant developer. Google it, the results are real, especially with Tri-X 400.

This is my favorite developer ever, especially for a home darkroom. The two-part method removes so much of the challenge of developing at home. No need for temperature control, or even precise development timing. Gives you an extra stop of speed out of film as well, which is great when you know to expect it. Diafine gives a distinctive and beautiful tonal range, and a beautiful look to the grain. A little goes a long way too, as the solution can be re-used many times.For a home dark room, I probably won't bother with other developers ever again so long as I can still get my hands on Diafine.