For hard bound books and coptic bindings we often bind using sections, otherwise known as Section Sewn Binding. We use either a 12 or 16 page section with an exception for heavier papers, where we would use 8 pages per section. These type of bindings can have either a square or a rounded spine and will lay flat.
A section sewn binding is made of printed folded sheets which are then sewn together. As they are folded and sewn together, the pages will need to be in the correct order for pagination before the document is exported as spreads.
The pagination will vary depending on how many pages per section there are. i.e. 12 or 16. The diagram below shows the pagination for 12 pages.
If you are a little unsure of paginating your file, we can do this for you as an additional service - Just send us a PDF as single pages.
If creating your own paginated spreads creep is also something to consider. Creep is where the pages shift and do not sit correctly when the pages are folded over each other. It is the distance pages need to move from the spine to accommodate paper thickness and folding. It is important to consider this for full bleed images and double page spreads.