How to increase the adhesive and book adhesive area

Nowadays, most of the slots on the market for bookbinder milling cutters are “^” grooves. We have found that this type of slot tip is too narrow and has a direct impact on the tear strength of the pages. Therefore, in order to increase the bonding area between the glue and the book, and increase the tensile resistance of the glue to the book, you can use the grinding wheel or the sandpaper to gently hit the top of the milling cutter, making the groove type “^”. Type, in this way, the sticky book is not easy to fall off, page off, and has a stronger tensile strength.