The book cover is laid out as one piece: 1 – spine, 2 – bleed and 3 – front and back cover size. In this example the size of the book is 148 x 210 mm, 248 pages on 80 gsm offset. From the spine calculator with “80 gsm offset” and “soft cover” selected we get 13.3 mm.
1 – Spine thickness from calculator with “Hard cover” selected. In the example of 248 pages on 80 gsm offset this would be 17 mm.
2 – 8 mm joint.
3 – Trimmed book block size.
4 – Card overhang of 4 mm, which is automatically included in dimension “3”.
5 – Finished cover height = block height +4 mm + 4 mm.
6 – 20mm addional for wraparound.
7 – Horizontal formula: 6+3+2+1+2+3+6 = Total width.
8 – Vertical formula: 6+4+3+4+6 = Total height.
The size of the document is: 148 + 13.31 (from the spine calculator) + 148 = 309.31 width and the height is 210 mm.
For ease of guides 2 columns was chosen with 13.31 Gutter.
In Bleed be sure to use 5 mm all around.
When exporting PDF under the "Marks and Bleeds" be sure to check the box "Use Document Bleed Settings."
