I posted pictures of this lovely contraption on the isupreservation Instagram feed a couple of months ago. This post goes into more details about the construction of it.
There must be many different ways to support an accordion book for an exhibit. Here is one idea, as envisioned and executed by Conservation Technician Jim Wilcox. This mount is made from 4-ply museum-quality mat board, adhered together with 3M 415 double-sided tape.
This accordion binding is a miniature artist book. The small size of the book means that it is very light, which makes it easier to manage stress on the joints and folds.
The mount enables the accordion binding to be displayed open. The covers of the book sit lower than the pages, since the covers are slightly bigger than the pages on all sides.
The open pages are supported by the top-most layer of mat board, cut in a zig-zag shape. In order to create this custom shape, the profile of the pages has to be traced onto a piece of paper, with the accordion open.
As seen in the sketch above, this particular mount was made from 4 layers of mat board. The number of layers can be adjusted depending on the book. Level 2 can be added twice if the cover has tall board squares or if the cover boards need extra support.
For a bigger, heavier book, additional support would have to be provided for the boards in order to keep them upright. A piece of mat board the size of the cover could be inserted and secured in the slot behind the cover to prop it up.
The area of green color seen in the picture above is created by one of the cutout slots, which is mentioned in the hand-drawn diagram. The book boards sink down to Level 1, the lowest level. The cutouts are made in Level 2.