The Fuji Digital RA Developer/Replenisher Part A 50 G is specifically designed to process RA-4 emulsions. It is highly regarded as the best solution to be used in the preparation of the working tank solution or as a replenisher. It is designed for use in all equipment processing color reversal films. It is available as a concentrate that is diluted with water for preparing replenisher or working tank solution. For the preparation of working tank solution or the replenisher tank solutiuon, the mixing ratio is mentioned that is highly recommended to achieve the best results.