The 250mL Low Contrast Developer from Rollei is a concentrate black-and-white film developer, which is ideal for panchromatic technical films. Because of the steep gradation high-contrast technical films have, this developer can be used to bend the gradation of the film for regular photographic projects. Moreover, the developer provides fine-grain, high-edge sharpness, and long tonal latitude. Because of its high sensitivity to oxygen, Rollei recommends that the Low Contrast Film Developer be stored in dark glass bottles or squeeze the excess air out of the original container when some of it is used.