Ilford PQ Universal is a liquid concentrate dimezones/hydroquinone developer suitable for the tray developing of all RC and FB black and white papers. Used at a dilution of 1+9 it is clean working and has excellent keeping properties. It gives a slightly warm of neutral image tone with most papers. In addition this product can be used to tray process technical films. It is also suitable for tray developing of general purpose sheet films when a fast working, high contrast developer is needed and a high degree of enlargement is not required. For film processing applications it is diluted either 1+9 (high contrast) or 1+19 (pictorial contrast). PQ Universal is not recommended for processing general purpose 35mm and roll film formats.