4-4
False Detection of Register Marks - Example 1
Plate displacement during offset printing
• Color printing by offset printing requires the output of CMYK plates.
A slight displacement between these plates also causes a displacement of the printed register marks.
• Register mark detection on the print with plate displacement results in displacement of the register mark origin
and therefore of the cutting position.
False Detection of Register Marks - Example 2
Square register marks (TP3 of Pattern A and TP1 of Pattern C; TP2 of Pattern A and TP1 of Pattern B) are not
separated by at least 10 mm.
• Therefore, when using offset printing, print the register marks on only one of the four CMYK plates
(such as printing register marks as K100%). Printing the register marks on one plate only eliminates
concerns about plate displacement.
• Determine an easily detected register mark color by considering the color of the printed workpiece.
(
Register mark origin
Detected register mark origin
Separate 10 mm min.
Separate 10 mm min.
PatternC
PatternA
PatternB
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