How much ink is used during the switching of black ink modes?

• The amount of ink flushed through the printer in the switching process varies, but we estimate the total ink usage (all cartridges combined) to be between 88 ml and 117 ml per switch.
  
  Switching from one black mode to another (for example, from Photo Black to Matte Black) does use a significant quantity of ink. Part of it is used to flush all of the old ink type out of the printer's tubing, damper, and head, and to prime those components with a sufficient amount of the new ink type. As part of the switching process, the printer also flushes a smaller amount of each of the other colors through the print head in order to prepare the head for printing again. All this is performed in order to ensure high-quality prints in the new mode after the switch.