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All borrowed from stencil.wiki and updated for the ME machine.
Convert drum to a new color
Procedure for converting the color of a Z-type drum. Steps 1 - 9 also work when machine does not recognize a correctly installed ink tube. Only for when the kind of color is changing (i.e. green to teal)
Steps
1/ Insert new ink tube
Turn the Riso on in Test Mode
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Run as many copies as it takes to fully convert drum to the new color
Usually more than 500.
Ink Color Codes - Rename Color Drums
Very useful to rename custom color drums !
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93 (Pink2)
94 (Special Color)
Step 6
Restart the machine normally.