Fotospeed CKRA4 Print Processing chemistry offers room temperature processing of 60 seconds development and bleach fixation at 20°C (68°F). The mono concentrate means single solution Developer and Bleach fix concentrates, which makes dilution clean and simple. The active ingredients are in powder form in the concentrate which extends the keeping properties of the concentrate and the active life of the working solution. Shaking the bottle before mixing puts the ingredients into suspension to enable partial mixing of the concentrate. The powder goes into solution when diluted with water to make the working solution. A 3 litre convenient kit contains all the chemicals you need while the developer and bleach ix components are available as 6 litre replacement packs