Adotol Konstant Universal Paper Developer (identical to ORWO (Calbe) N 113) is a powder developer with high working capacity, which produces a neutral-black image tone. It works consistently until failure and is very long-lasting. This developer will remain fresh for a long time, even when left uncovered in a tray.
Powder developer will outlast any liquid concentrate developer in terms of shelf-stability and working capacity. The package contains enough powder to make five liters working solution.
Mixed solutions will remain fresh for 6 months to 1 year in a fully-filled and airsealed bottle.