Ilford PQ Universal Paper and Film Developer, is a liquid concentrate developer suitable for dish or tray developing of all resin coated (RC) and fiber based (FB) black and white photographic papers. It is a dimezones/hydroquinone derivative. As opposed to Ilford Multigrade developer, this developer will yield a slightly warmer tone.
PQ developer has excellent keeping properties. In addition PQ Universal can be used to dish or tray process Ilford and other manufacturer's technical films. It is also suitable for dish or tray developing of general purpose sheet films when you require a rapid working, high contrast developer. This developer works well when a high degree of enlargement is not required.
It should be noted that Ilford recommends that gloves, eye protection, apron or overall be worn when handling and mixing all chemicals.
Note: PQ Universal is NOT recommended for processing general purpose 35mm and roll film formats, or for high temperature or machine processing applications
For film processing applications it is diluted either 1+9 (high contrast) or 1+19 (pictorial contrast)
PQ Universal developer is designed for use at ambient room temperatures: 20°C (68°F)
Dilute 1+9 or 1+4 for nornmal working conditions; dilute 1+9/1+19 for technical and sheet films