Perfect Bound
Bookbinding is the process of physically assembling a book of codex format from an ordered stack of paper sheets that are folded together into sections or sometimes left as a stack of individual sheets. The stack is then bound together along one edge by either sewing with thread through the folds or by a layer of flexible adhesive. Alternative methods of binding that are cheaper but less permanent include loose-leaf rings, individual screw posts or binding posts, twin loop spine coils, plastic spiral coils, and plastic spine combs. For protection, the bound stack is either wrapped in a flexible cover or attached to stiff boards. Finally, an attractive cover is adhered to the boards, including identifying information and decoration. Book artists or specialists in book decoration can also greatly enhance a book’s content by creating book-like objects with artistic merit of exceptional quality.( https://en.wikipedia.org/wiki/Bookbinding ).
Binding types:
- Saddle Stitch
- Perfect Bound
- PUR Bound
- Thread Sewn
- Spiral Bound
Saddle Stitch
A form of binding that uses staple shaped wires through the middle fold of collated sheets. In saddle stitched work that printed sections are inserted one inside the other on a saddle before stapling along the back fold.
Perfect Bound
An adhesive form of binding. Signatures that are folded will have a section of spine cut off with the back edge rougheed, glue will then be applied and the cover attached.
PUR Bound
In this method we use the most flexible and strong adhesive.
Thread Sewn
A paper or board book cover that is attached to a sewn book block by gluing the spine and then trimmed to final size. In producing the sewn book block, after gathering of signatures, the sewing machine inserts threads through the spine of each section and then uses further thread to join the sections to each other to form the book block.
Spiral Bound
A form of binding using a spiral of continuous wire or plastic looped through punched holes in the documents back margin. This can be either metal or plastic.