For the edition of even-numbered signatures, the principle of taking points on the number axis (see the figure below) can be used as the edition method:

1) Move the first and last yardage (that is, take two points on the number line), and move them to the front of the signature (+) respectively.

2) Starting from the second page number (ie the second point on the number line), every two consecutive codes are a group, and each group (ie two consecutive points on the number axis) are sequentially moved to the reverse side (-) and front side of the signature ( +) Until all movements are completed, that is, take a point on the number axis to end.

Which "Principle of Separate Edition" column jumps and the curve with arrow refers to the simulation process of the separate edition. Which "code sequence decomposition" column refers to the specific 8-page signature division.

Even-numbered signatures refer to: 2-page, 4-page, square 6-page, 8-page, 16-page and other signatures, and include their straight and horizontal signatures, as well as single and double-linked signatures and other even signatures.

Schematic diagram of even-numbered signatures (8 pages as an example)

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