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FLEXO Magazine : July 2009
DESIGN 3.1.1 Registration Tolerance When one word is printed in one color and another word next to it is printed in a second color, register shifts can cause these two words to overlap or misalign. Due to this register shift, different color text should be more than twice the image trap dimension away from each other. Table 3.1.1 Image Trap Tolerance provides general trap guidelines by print segment. Confirm the trap tolerance with the print provider. Table 3.1.1 Total Trap Tolerance: General Guidelines Trap tolerance is print system dependent; determine minimum trap with a press fingerprint Segment Preprint Linerboard Total Trap Between Station Combined Corrugated Through The Press Wide Web Folding Carton Multiwall Bag Film Products Newsprint Paper Products Narrow Web Film Products Envelope Total Trap Total Trap Total Trap Total Trap Total Trap Total Trap Total Trap Color-to-Color </=0.0156” (1/64”) </= 0.3969mm </= 0.0625” (1/16”) </=1.5875mm </= 0.125” (1/8”) </=3.175mm </=0.0156” (1/64”) </= 0.3969mm </=0.0313” (1/32”) </=0.7938mm </=0.0156” (1/64”) </=0.3969mm </= 0.0156” (1/64”) </= 0.3969mm </=0.0156” (1/64”) </= 0.3969mm </=0.0156” (1/64”) </= 0.3969mm </= 0.008” (1/125”) </= 0.2032mm Printer Specific Trap Allowance S. Gilbert 3.1.1a: Image Trap: When trapping two colors, FIRST recommends “spreading” or enlarging the lighter color under the dominant color.
Sustainable Spring 2009