Ilford ID-11 Fine Grain Developer for Black & White Film, Powder to Make 5 Liters. Two Packs of Powder Insure Long Shelf Life. An Economic, Versatile, Powder Developer and Replenisher System for Processing Large Volumes of all General Purpose Black and White Films. A Fine Grain Film Developer for all General Film Processing Requirements Where Fine Grain Negatives are Required Without Loss of Emulsion Speed. Ensures the Best Balance of Fine Grain, Sharpness and Tonal Rendition Producing Negatives which allow a High Degree of Enlargement.