Why are the master marks (crow’s feet) so important? Can they be moved?

Answer: No.

The master marks (also called “guide marks” or “crow’s feet”) are important because they show the die cutter where to place the envelope die for proper cutting position. Marks should be 3/32" to 1/8" away from the bottom flap on each side. This information is made available with every furnished envelope layout from National Envelope. If you have any questions pertaining to the layout, please call your nearest National Envelope location for assistance.

Why can’t copy bleed just to the folded edge? Why do you have to have copy wrap around to the back?

Answer:

Due to overall envelope converting tolerances (1/16" to 1/8"), ink bleed coverage must extend past seams and gum areas at least 3/16". For larger Catalog and Booklet envelopes, the bleed tolerance is larger. A measurement of 1/4" should be used. When you pre-print a sheet of paper to be converted, by die cutting a stack of paper– (approximately 200 sheets at a time)– and placing an envelope die for each stack, it is not possible for the copy to be perfectly consistent for each and every blank. It is necessary when bleeding copy to bleed past the folded edge to insure tolerance for the envelope die cutting and converting process.