Ilford ID-11 Film Developer 1L is a powdered, fine grain, black and white film developer. Ideal for use with a wide range of black and white films. It ensures the best balance of fine grain, sharpness and tonal rendition. Producing negatives which allow for a high degree of enlargement. If you use this as a stock solution there is no need to mix up developer each time. Simply prepare the stock, and reuse the developer until exhausted. You can also use ID-11 as a one-shot developer.