Fujitsu N7100 Operator's Manual page 339

ATTENTION
 When printing a patch code sheet, pay attention to the following:
 Use blank white paper.
 Print it at 100%. If you print it in a reduced size, the printed sheet is not recognized
correctly.
 Do not use the toner saving function. When the printing is light, it is not recognized
correctly.
 Do not use thin paper. When bleed-through occurs, the printed sheet is recognized as a
sheet that is printed on both sides.
 When you copy the printed patch code sheet with a copier, configure the copying setting so
that the copied sheet has the same size and printing density.
 Using the same patch code sheet repeatedly may decrease the recognition accuracy due to
accumulated dirt on the sheet. If the sheet is not recognized correctly or gets smudged, print
a new patch code sheet and use it.
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5.14 Processing a Job