Reply To: Preparing PDFs with spine-spanning images

As Eugene says follow what the printer says, and don't ever try to account for creep, it's a press setting based on the paper weight.

However, I also agree that you don't want to loose a bit of the image into the spine, an old colleague of mine used to insist on adding a 6 point offset to any dps images, and it did work. It does look wrong in the document but when printed worked well.

If you can see a bound proof of it then you can make a call on it then.