Flushing One Color Channel Epson 7890

Can a single refillable cartridge from Inkjet Mall be used to flush out just one color with PiezoFulsh, Photo Black on an Epson 7890, or do all the color channels have to be flushed together?

If some ink is going through that channel you can flush with a single cart of PF with this procedure:

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How To Flush Individual Channel using QTR Calibration Mode
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](How To Flush Individual Channel using QTR Calibration Mode)

Warmest regards
-Walker