Making books is one of my passions. I have so many scraps and leftovers from gell printing, so why not try to use a part of them, making this envelope book. A simple construction where you can make as many spreads as you want. From a pack of double cards with a square hole, I have used the envelopes. Of course you can use size of envelopes, they just have to be the same size. Focal points is from a Flora Danica calendar, Fungi.

Link to Concertina book with square windows/holes.:

https://www.dragenkunst.dk/
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  / dragenkunst  
https://pin.it/6obzHAP