A Brief Introduction To Leather
I recently took part in a course through the Canadian Bookbinding and Book Arts Guild (CBBAG). This course is one of the many they offer, and is a prelude to their level three bookbinding course, in which students learn to bind in leather. Our instructor was Dan Mezza, a well known and highly sought-after bookbinder in the London, Ontario area. Taking lessons with Dan is always a pleasure as he truly knows the topic! Dan was a paper maker before he became a bookbinder.
Our introduction to leather was a three-day long course spanning a weekend. In this course we learned a bit about the history of leather, the types of leather used in bookbinding and how to properly pare leather and apply it to the board. We made a plaquette in the end for demonstration purposes.
Before we got started, we discussed what leather was, and the process used to make the leather we use for binding books. I’ll share a little of that here.
Leather is skin, common to all animals. Dan even showed us a book from fish skin and kangaroo skin. Leather is created by removing the hair, hair root and epidermis (surface layer of hard dead cells). These three layers are removed in tanning and the following are kept for leather: grain (outer layer from surface to hair root), corium (large fibre bundles interwoven at a higher angle towards the surface), and the junction of the grain and corium (this is different for each animal and the size of hair in an animal determines the strength of the leather).