Many bookbinding machines do not use loose-leaf binding, so it is difficult to add or delete pages after binding. Loose-leaf binding means that it can be disassembled and assembled at any time without destroying the binding shape, and the binding method of changing the content is recognized as loose-leaf binding. At present, loose-leaf binding mainly includes card binding, lever binding and apron binding.

The rubber ring is easy to bind and disassemble, and can be used repeatedly; Comb binding is loose-leaf, which is convenient for adding and deleting pages and can realize 360-degree text flipping.

Card binding, which can be disassembled again, is suitable for increasing or decreasing page numbers afterwards. The layering is colorful and the binding effect is beautiful.