This is your reference fold, and it is always the fold in the middle of the sheet. Using the reference fold to make subsequent folds ensures your accordion will have evenly sized panels. Fold A to the reference fold and crisp it up with your bone folder (

Accordion folds are popular in scrapbooking and other craft projects, beginning with children’s fans made from old schoolwork. You can fold any type of paper in an accordion, or fan, fold, but you may find creasing heavier papers easier with a bone fold

An accordion fold is created by folding a sheet of paper back and forth with three folds. It is similar to a Z-fold but has one more fold. It forms the letter “M” when viewed from the side. The name comes from its obvious resemblance to an accordion.