Leather Reback - Quarter Bound

This is another book from the Syracuse University Ranke Collection that was a good candidate for rebacking. The sewing was completely intact (on raised cords), but the leather at the spine and joint was delaminated.

I was able to remove most the leather from the spine dry, and applied a thin layer of methyl cellulose to remove the rest. Then, I pasted out the spine, and lined it with Japanese tissue. While that dried, I cut strips of linen to be glued down between the cords. Then, I resewed the end bands.

Using a scalpel, I cut along where the leather meets the paper on the boards. I removed the old leather, and lifted the paper slightly. I also lifted the endpapers at the corners and at the spine, for the turn ins. (I also put some brown Morike underneath the lifted paper for support. The paper was brittle and kept breaking. Adding the Morike enabled me to handle it without causing more damage). I measured and cut the new leather and prepared it by paring, dampening with a sponge, pasting it out, and allowing it to sit for the paste to soak in. Then I reattached the boards by gluing out the linen strips and bringing them on to the board. I trimmed the linen so it only overlapped by about half an inch. Then I cut two strips of 10 point board, the exact distance from the spine edge of the board to about 1mm before the paper. This makes the transition between the new and old materials smoother. After gluing down the 10 point strips, I attached the new leather to the corners, and put some silicon release paper between the board and text block. Then I attached the new spine leather, running a bone folder along the cords to accentuate them, and leaving enough material at the turn in to construct the head/tail caps. I wrapped a piece of cord around the joint, and put the book in a press to dry.

Leather Reback

On a recent field trip to the book conservation lab at Cornell University, I saw a few leather bound books that were rebacked with new leather (calf). This was interesting for me because most of the leather rebacks were do at Syracuse are repaired with PC4 paper. I decided to go through the stacks and find a good candidate for this treatment. This was the book I found.

My first step was to dye some of the calf leather we had to match. I used J.Hewitt aniline dyes, which start as a powder. You mix the powder with wheat starch paste (powder) and a little water to make a paste, then dilute as needed with boiling water. Dampen the leather with a sponge, then apply the dye. This picture shows the leather before (left) and after (right) dying.

While the leather was drying, I removed the old spine piece (saving the label), and cleaned the spine with methyl cellulose. I had to watch it carefully to the original end bands did not come off with the gunk. I pasted out the spine and lined it with Japanese tissue, which came up on to the end bands for additional support. Then I cut strips of linen, to fit between the cords, and glued them down with PVA. While the spine dried, I lifted the leather and end papers at the spine and corners of the boards. I reattached the boards by gluing the linen spine lining down under the lifted leather.

I pared and pasted out the new leather (one thick coat, let sit for 10 min folded over itself, add another coat) and molded it over the corners and spine. I also made sure to leave enough leather at the head and tail (after turn ins) to construct head and tail caps. I left this to dry over night. 

The next day, I glued down the lifted materials with PVA. I glued out a strip of Mylar, and slid it under the lifted leather, tapped down on it gently, and slid the strip out. This ensures just enough glue gets underneath, and has less risk of the leather darkening. I also pasted out strips of Japanese tissue for the inner hinge. 

While this dried, I worked on the spine label. I found a Morike similar in color to the label, and glued two pieces together. Then I glued the original label to the Morike and toned it to a better match with acrylics. I measured the spine width, and the height between cords, and cut the Morike to size. Then glued it in place with PVA. These are pictures of the end result.

I am going to try the technique on other books in the lab. The biggest problem I faced was building up my corners, which is something I need to work on. Other than that, my color is a little light, so the next time I will add a few additional coats of dye and dab them on with a sponge, to give the leather an aged look. Aside form dying the leather, this process didn't take much longer than a PC4 reback, and I like the end result better. Obviously the materials for this type of repair are more expensive, but I think it is worth it for the right books.