This economic, versatile, highly concentrated liquid developer is ideal for processing all general-purpose black-and-white films. Using the appropriate dilution, it can be used in all process systems including dishes (trays) small tanks, deep tanks, dip and dunk (hanger) processors, rotary tube processors, continuous long leader processors, roller transport processors and short leader card processors.To use Ilfotec HC developer, the concentrate is first diluted to make a stock solution. The develoer stock solution must be further diluted for use. The degree of dilution will depend on the film to be processed and the method of processing. Do not use Ilfotec HC developer as replenisher.Ilfotec HC solutions have a long life and good resistance to contamination, reliably producing high-quality, sharp results under a wide range of conditions. The recommended operating temperature range is 20-24°C (68-75°F).