Rollei Supergrain is a modern fine-grain developer for black and white films. Super Grain delivers superior image quality with extremely fine grain. It produces sharp results, making full use of the film speed. Supergrain is the result of further development of the classic AM-74 recipe. Dilution: 1 + 9, 1 + 12 and 1 + 15. Yield: up to 60 films.