ILFORD 2000 RT fixer/replenisher is a non-hardening rapid fixer also supplied as a liquid concentrate in master cartons containing two 2 1/2 gallon cubitainers. Dilute 1 part concentrate with 4 parts water to make working strength fixer and replenisher. Mix thoroughly. ILFORD 2000 RT fixer/replenisher is formulated for use at processing temperatures of 68°F to 90°F (20°C-32°C). Since it is a non-hardening fixer, it permits shorter and more efficient washing with resin coated papers. Replenish the working strength fixer at an initial rate of 12.5ml for each 8x10 inch sheet or 22.5ml/ft 2 of material being processed. This rate will provide adequate replenishment for most processors but may be adjusted if necessary. The pH of freshly mixed replenisher solution is 5.05±1.0. The specific gravity, taken at 68°F, is 1.078±0.05.
Temperature Development Time 68°F (20°C) 45-50 seconds 77°F (25°C) 30-35 seconds 86°F (30°C) 20-25 seconds 95°F (35°C) 15-20 seconds. Times are suitable for replenished systems with a solution life of 3 months. The solution life is dependent on paper throughput. A suggested minimum is 30ft 2 or 54 8x10 inch sheets of paper per liter (0.26 gallons) of working strength solution per week. If throughput is considerably less than this, the chemicals may degrade prematurely. To maintain print quality, it may be necessary either to mix fresh tank solution every 6 weeks or double the replenishment rate. Use the same fixing times and temperatures as those recommended for development. Fixer replenishment should be sufficient to maintain a maximum of 4 grams/liter of silver in the fixer bath. Wash papers that are machine processed with ILFORD 2000 RT chemicals according to the recommendations of the processor manufacturer. Unopened bottles of ILFORD 2000 RT chemicals will store for up to 18 months. Once opened, the developer will keep for about 4 months and the fixer for 6 months in tightly capped bottles.