A model devised by Carmencho Arregui, inspired by the prototype of a double sewing binding, without any gluing, where the pages of the two parts overlap on the center.
It's a very versatile binding, which can be used to contain (and display) calligraphic and graphic works of particular size, as well as loose sheets.
We will make two models: one with independent sections, and one with two concertinas which will be tied down to the cover/structure to become a holder for additional folded papers.
Open to both beginners and advanced.