Processing systems with a plurality of supply reservoirs

A post-processing system comprising:

• a processing chamber to hold a finished part to be post-processed after having been additively manufactured, the processing chamber being other than any chamber in which the finished part was additively manufactured;
• a first supply reservoir to contain a first processing fluid;
• a second supply reservoir to contain a second processing fluid;
• one or more injectors directly fluidly coupled to the first and second supply reservoirs to inject the first and second processing fluids from the first and second supply reservoirs into the processing chamber;
• a first recovery reservoir fluidly coupled to the processing chamber to recover the first processing fluid after injection into the processing chamber;
• and a controller to control the injectors in accordance with a post-processing sequence for post-processing the finished part after the finished part has been additively manufactured,
• wherein the post-processing sequence comprises:
• sequentially injecting a volume of the first processing fluid into the processing chamber from the first supply reservoir and then a volume of the second processing fluid into the processing chamber from the second supply reservoir;
• and in-between injecting the first and second processing fluids into the processing chamber, draining the first processing fluid from the processing chamber into the first recovery reservoir.