HCL PP SPVR-1R Developer is a single-part concentrate. When it is mixed correctly, you should replenish it at 108 mL/M2 of paper processed. The working tank temperature is 38±1°C (100.4±1.8°F). HCL PP SPVR-1R Developer is recommended for minilabs with moderate to high utilization. HCL PPRT-1R is a three-part concentrate. When it is mixed correctly, the replenishment rate is 210 mL/M2. The working tank temperature is 95ºF (35°C). HCL PPRT-1R Developer is recommended for use in rotary tubes, trays, low-utilization minilabs, and roller-transport processors.