Butterfly dresses are also divided into paperback and hardcover. Butterfly paperback is usually referred to as butterfly skirt for short, and it is generally less than or equal to 10P( 1P=2 pages), and the inner pages greater than or equal to 20P are generally jammed.

The binding method of the inner page is that two sheets of paper are glued together, so the thickness of the P page is nearly twice that of the P page in the photo album. The biggest advantage of this kind of binding is that the inner pages can be completed.

All flattened, almost unaffected by the middle seam. This binding method is exquisite and beautiful, which is more suitable for customers who have certain requirements for binding.

The hardcover of butterfly dress is usually called butterfly hardcover. The hardcover material of the butterfly skirt is no different from the paperback, and the cover is cardboard.