Single Piece of Paper Board or Binding Material*

A soft non edge cover of a single piece paper board is produced very similar to a perfect bound book cover — the paper board is trimmed to a size (1st cover type**) but the book block is bound with endleaf papers glued on. In the second case a single piece of binding material* is glued on a piece of paper board and then trimmed to a size (3rd cover type**). Only then the book block is bound.

Hard, semi hard, soft plastic

The most lasting (9th cover type**), suitable for intensively used products, for other aggressive environmental factors also it is moisture-resistant. Not in vain this binding is used for documents, for often used books like "Bible", etc.

* covering material includes special material that is used for case bound books. 
** all cover types are classified according to the Professor Stefanov selections (Professor Stefanov reference book page ..., scheme No. ...).