Ilford Harman Selenium Toner is a liquid concentrate toner, designed for the dish/tray toning of all black and white photographic papers both resin coated (RC) and traditional fibre based (FB). This toner provides a simple and effective approach for the user wishing to produce Selenium toned prints. It is designed to be used at ambient room temperatures, nominally 20°C/68°F. Use Harman Selenium Toner to enhance the archival stability, and maximum density of prints. The colour and degree of tonal changes achieved will vary according to the type of paper: ranging from cool chocolate-brown, through purplish brown, to little discernable change. Warm tone papers usually produce the most visible effects. The toner is versatile and convenient to use, with a long working dish/tray life.