Ilford Ilfotec DD-X complements the Ilford black and white film range, particularly the Delta Professional films. It ensures a good balance of fine grain, sharpness, and tonal reproduction. The result is negatives that are easy to print and allow for a high degree of enlargement. Correctly exposed negatives developed with Ilfotec DD-X have a full tonal range, with depth in the shadows, a smooth transition in the midtones, and bright, detailed highlights. Ilfotec DD-X is supplied as a liquid concentrate and is typically diluted for single use at a ratio of 1:4. For greater economy, it can be reused, although the image quality may be slightly reduced.