What are 'Dingkou' and 'Lekou'

What are 'Dingkou' and 'Lekou'

The binding area refers to the blank space between the binding point and the center of a book. The binding of binding can be divided into string binding, three limit binding, sewing binding, saddle binding, wireless adhesive binding, etc

The incision refers to the part of a book that has been completely cut on the other three sides except for the binding opening, which is divided into the upper incision (also known as the "top" and lower incision (also known as the "foot"), and the outer incision (also known as the "book opening"). The sky head refers to the white edge above the center of the board, and the foot refers to the white edge below the center of the board. The notch is the white edge inside the center of the board, and the incision refers to the white edge outside the center of the board; Books with straight layout are often placed on the right side of the book, while those with horizontal layout are placed on the left side of the book.

Le Kou, Piao Kou

Le Kou, also known as folding mouth or floating mouth, refers to the part of a paperback book that leaves 5-10m of blank space at the cut of the cover and back or hardcover book cover, and folds inward along the book opening. Sometimes there are content summaries, book introductions, author introductions, etc. printed on Le Kou. The outer shell of hardcover or soft hardcover books should be 3mm longer than the three incisions on the book core to protect it. If it is a key book, the designer can design the width of the notch to be basically the same size as the cover. The front and back mouths can also serve as supplements to the information conveyed in this book. The front notch can display the author's photo and brief introduction, while the back notch can include the names of the responsible editor and designer, and some may include pricing.