The Ilford ILFOTEC DD-X Developer is an essential part of a darkroom photo development kit. It is ideal to use with the Delta 3200 Professional film that is rated at EI 3200/36. The negatives developed in the Ilford ILFOTEC DD-X obtain a wide range of color tones, deep shadows, and smooth tonal gradation from mid to bright. You can also use the developer with other professional black-and-white films as well to get unique results. The film developer comes as a liquid concentrate and needs to be diluted with water in a measurement of 1+4.