Leather Reback - Wooden Boards

This was a book from the Ranke collection at Syracuse. The spine was deteriorating and the boards were detached. It was not a good candidate for rebinding because of the level of tooling on the boards. The boards were also wooden, which is not common, and therefore should be preserved. This was the original condition of the book.

I cleaned the spine with methyl cellulose and lined it with Japanese tissue and linen. I made some page repairs with heat set tissue, and resewed the end bands. I lifted the original leather at the spine and corners, attached new, and repaired missing areas or cracks with Japanese tissue. Finally, I toned the tissue to match and applied a coat of SC 6000. This is the end result.

Note: For this particular book, the SC 6000 was a mistake. It caused the tissue areas to shine more than the original leather surface, even after a coating of Klucel G. I would advise against the use of SC 6000 if the original material had lost sheen or if the repaired area is very large.

Building Up Corners

This was a leather bound book that I did Japanese tissue repair for. A couple of the corners were seriously damaged and misshaped.

To infill the corners, I cut small squares of board. These should be small enough to handle, but extend past the book's board edge so they can be trimmed to size later. I parred these squares of board at one corner, until they were thin enough to fit between the existing board. It is important not to par too far out. Remember the thickness of the square should be flush with the book's covers at the board edge. I attached these squares with PVA. Then I covered the new material with Japanese tissue, overlapping on to the original leather.

When all the corners were repaired, I toned them to match, and applied SC 6000 wax. This is the end result.

Tissue Repair on Leather

This particular book's joint was broken and the spine was loose. It also had damage to both end caps. I repaired these areas with Japanese tissue. Unfortunately, I was working on a group of seven tissue repairs and did not take "before" pictures. Because the leather was also deteriorating, I coated the entire book with Klucel G. This picture shows the book before toning.

I was very lucky because the color of this leather was easy to match. For this reason, I decided to tone the areas of deteriorated leather between the gold stamping. After doing this, I applied SC 6000 wax to the areas treated with tissue, to add shine and create the appearance of leather. This is the end result.

Rebacking Experiment

Rebacking cloth bindings is a relatively common repair, with several variations in treatment technique. For this reason, I decided to experiment with two different methods by experts in the field. Using instructional manuals, I completed two cloth rebacks in the style of Don Etherington and Dominic Riley.
To begin I choose a set of two books from the stacks, which were identical in size, thickness, and required the same level of treatment.

The first step in each method was the same. I separated the text block from the case, cleaned and lined the spine with Japanese tissue (paste), and trimmed the boards (just a hair) at the joint edge. Next, I attached the head and tail bands to both books and lined the spine with linen (PVA), using aeroplane linen on the Etherington volume because it is what he advocates. With the linen lining providing extra stability, I repaired broken sewing in both volumes. At this point, both methods advise attaching a spine lining of "thickish" paper, the exact height of the text block. I used 10 pt board (PVA), dampening the strip for the Etherington volume as advised.
The next step in Riley's manual is to repair the corners, using wheat starch paste, and dry them under pressure from a bull dog clip (I used clothes pins). I typically use PVA for corner repairs, so I treated the Riley covers as directed and left the Etherington (to be treated with PVA) for comparison. Then I lifted the cloth and endpapers on both books. As advised in the manual, for the Etherington volume, I removed excess board fibers by lining the lifted area with masking tape, pressing down, and pulling it off. This does remove a good amount of unnecessary board.
With the text block and covers prepped, I began constructing the new spine pieces. This was really the biggest difference between the two. Riley suggests using toned cloth, sized with methyl cellulose. For this is used linen, and toned with an acrylic/cellulose mix. Then I attached a spine stiffener of 10 pt board. Etherington prefers to use Japanese tissue. He suggests using morike of a similar color, lined with linen, and coated with Klucel G. I had to tone the morike available slightly, so I used an acrylic/Klucel mix. For this spine stiffener, I used blotting paper, because Etherington claims it is easier to shape (which proved true). I parred the edges on both spine pieces to reduce bumps under the cover cloth.

When the spine pieces were ready, I cased in each volume. Both advocate attaching the new spine piece first. Riley's detailed instructions were very helpful for this part. He suggests positioning the boards and then moving the book to a press, sticking out enough to have room to freely move the lifted cloth (The ploy-press was very handy for this part). Next, I glued out the cloth (making sure no adhesive got on the spine stiffener) and positioned it on the text block, with the stiffener was in the correct position. With the spine piece in place, I removed the book from the press, and glued down the turn-ins. Then I attached the case by drawing the linen over the joint, with the cover raised by boards and weights keeping the book in position (as seen below in my Reattaching a Text Block entry).
Etherington suggests casing-in a similar way, except he attaches the Japanese tissue to one cover first. Next he attaches the spine stiffener in the necessary position and trims the second edge of the Japanese tissue spine piece to fit in position on the second cover. I opted to attached the spine stiffener first and trim the morike to size, so the spine piece could be parred.
The finishing steps for both volumes are gluing down the endpapers and cloth, reattaching remaining original spine pieces, and toning with acrylic. This is the completed set (vol. I - Etherington, vol. II - Riley):

My reason for this experiment was to learn variations of cloth reback repairs, and develop a personal preference. I really liked Riley's method, and have used it since. I was taught to attach the text block to the covers first, then add the spine piece. I feel working on the case first is faster, and I like the end result better. However, I do prefer to use morike lined with linen for the spine piece, because it is easier to work with and to tone.
I was also interested in the difference between the paste (Left) and PVA (Right) corners. The corners repaired with paste and held with clothes pins dried perfectly flat, while the PVA corners remained slightly curved. The only problem is the paste took a long time to dry. I think whether this additional time is worth while will depend on the book (2010).

Manuals used:

Repairing an Original Cloth Case Binding - Don Etherington

The Art and Science of Cloth Rebacking: Some Useful Techniques Shared - Dominic Riley

Reattaching a Text Block

The following is a simple way to reattach a text block, applicable when the case is in tact. With this particular book the text block was completely detached, but the case was in good shape and I did  not want to disturb it.

The first step was to gently lift the old spine lining with a spatula, and attach a new stiffener made of 10 pt board (PVA). Once that dried, I lined the entire spine with Japanese tissue (paste) overlapping slightly on to the boards and leaving some excess at the head and tail.

When the spine lining was dry, I trimmed the excess with a water pen, wrapped it around, and then attached it to the covers (PVA).

While preparing the case, I cleaned and relined the spine of the text block using methyl cellulose and Japanese tissue (paste), leaving a little excess at the shoulders to connect to the case. I also added head and tail bands and a linen spine lining, which was flush with the shoulder. The next step was to tone some Japanese tissue to match the end papers. I did this by mixing acrylics with Klucel G (to stop the Japanese tissue fibers from fraying).
To reattach the text block I needed to simulate opening with the joint intact. I placed the text block in position and raised the cover (with boards) so that the groove aligned with the shoulder of the text block, and applied weights to keep the book in position. Next, I pasted down the excess Japanese tissue from the spine lining. Then I measured out a piece of the toned tissue to be the height and width of the joint, overlapping onto the cover and text block, and attached it using paste. Using a dry brush, I gently tapped the toned tissue against the joint, to ensure it sticks properly. This must dry in position, so it is critical to keep the weights on at all times.

This is the end result:

After repeating on the other side, I repaired the bumped corners and toned the Japanese tissue on the covers.

Rebacking Full Leather Bindings

Rebacking is a treatment typically performed when the text block has broken at the joint in the following three ways: where the endpapers fold, where the boards are connected to the text block (linen or mull spine liner in cloth bindings and the cords that lace on boards in leather bindings), and the cover material. Rebacking consists of constructing a new spine piece out of durable/flexible paper, and using it to reattach the text block and boards so the book can function properly.
To illustrate the process with full leather bindings, I selected four dictionaries from the collection at Syracuse which needed rebacking. All front covers were detached from the text block, and about half of the back covers. Spines had split away from the covers and had several bits missing and all the endbands cracked and coming away from the text block. The following images depict this condition.

 

The first step is to clean and reline the spines. I removed the old covers, spines and broken endbands. Using silicon release paper lined boards, I cleaned each spine with methyl cellulose, being mindful of the raised cords. When the spine was clean, I lined the entire spine with Japanese tissue. Since it is necessary for the cords to remain uncovered, I wanted to practice with two main methods of attaching the linen lining. For two books, I cut the linen into strips the exact distance between the cords, and lined each section between cords and at the head/tail. This took much longer, but laid flatter. For the other, I cut one long strip of linen, and then cut out spaces for each cord, which was faster, but bunched and wrinkled by the shoulder. Once the linen was attached I began resewing the endbands. Due to the large size of these books (approximately 18" tall), I had to move from the bench to the board shear to get the right height for sewing.

When the endbands were completed I began preparing the spine pieces. For leather bindings, PC4 paper is used. It is a heavyweight paper, which is toned with methyl cellulose and acrylics. PC4 paper is relatively flexible when damp, but dries rather hard, functioning as the spine and the stiffener. The PC4 paper is cut into strips the length and width of the spine, accounting for turn-ins, and is parred at the edges. In order to fit tightly over the cords, the prepared spine piece must be molded. This is done using a finishing press (with screws along the sides) and cords. The PC4 paper must be dampened and placed in position. When this is done cords are wrapped around the raised cords of the spine, and secured at the screws like so:

While the spine pieces were drying, I worked on lifted the endpapers and leather on the covers. I then began re-attaching the boards to the text blocks via the linen. First I placed a sheet of waste paper and silicon release paper under the linen. Next, I glued out the linen (PVA) and removed the waste sheet. Then I  placed the covers on so the linen would stick to the board where the endpaper was lifted away, and kept the book closed to dry. Once it was dry, I began attaching the PC4 spines.
I began by putting the spine piece in position. I work with the book flat on the bench so the spine piece is weighted down by the text block. I glued out the board underneath the lifted leather (PVA) and continuously pressed down the PC4 paper until it stuck. Then I placed silicon release paper between the PC4 paper and the lifted leather (to prevent moisture from being introduced to the leather too soon), and flipped the book over to dry under the weight of the text block. I did this to all four books, then repeated the process with the other side. Then I glued down the lifted leather (PVA). Once all the spine pieces were attached to both covers, I glued down the head and tail turn-ins. When those had dried, I glued down the lifted endpapers (PVA), and then covered the hinge with a strip of Japanese tissue (paste).
After all the inside hinge repairs were done, I glued the remaining original spine pieces to the new PC4 spine (PVA) and consolidated the leather with Klucel G. Next I repaired the corners and put Japanese paper along the leather at the joint and along the edges of the original spine pieces. I used two different methods for this as well. On two books I used morike (top), which had to be cut to shape with a water pen, but was already a similar color and therefore easier to tone. On the other two I used dry tear strips (bottom), which allowed for fast and easy application, but proved more difficult to tone. Finally, I rubbed some SC 6000 over the joints to add some shine to the toned Japanese tissue and prevent the acrylic from cracking with use (Winter 2009).

 

Miniature

This was the first miniature to come into the conservation lab, (at least while I was working) and I jumped on the opportunity to treat it. I wanted to see the difference scale made in treatment. The treatment methods used were the same, but it was definitely harder to work with such small amounts of material. This miniature's text block was detached from the case and the first flysheet was detached. The case was in two pieces, and the leather was splitting in several places.

I reconnected the leather case and repaired the edges with Japanese tissue and PVA.  This picture was taken in the middle of that process. I ended up having to put Japanese tissue over the entire strap because the bonded leather continued to split after my initial repair every time I touched it. After the tissue repairs were complete, I consolidated the leather with Klucel G.

I reattached the flysheet to the text block using Japanese paper and paste. Then I attached the text block to the case by lining the spine with tissue, leaving approximately 1/4" overhang, which I used to connect the text block to the case (using paste). When that dried, I toned the case with acrylics.

When the book was finished, I made a foam case and constructed a phase box for it (Fall 2009).

Recasing

Occasionally in the library, I encounter books with covers so badly damaged it is easier (and cheaper) to recase the text block than to mend the original covers. Recasing is also a treatment option for damaged books that are not especially valuable.
This is an example of a book I recased. It was originally a quarter bound leather, tight backed (fastback), with marble paper covered boards. The paper was torn and faded with dirt and age. The spine had completely delaminated and split off the front board (Top). Delamination at the spine also caused the text block to split (Bottom).

I started by removing the cover. I pressed the sections of the text block together between boards, and cleaned the spine with methyl cellulose to removed the old liner and adhesive. The sewing was cut in several places, so I had to pull the text block apart. I washed and deacidified the sections in filtered water and magnesium bicarbonate [Mg2(CO3)2]. After the pages dried, I repaired damaged areas with heat set tissue, and guarded each section using wheat starch paste and Japanese tissue. I realigned the signatures, resewed the text block, adding dove gray endpapers and lined the spine with Japanese tissue. The addition of materials from guarding caused swell in the spine, so I rounded it to reduce this swell.

I decided to mimic the original case design with a quarter binding in PC4 paper. I cut the boards to fit, attached the PC4 spine and trimmed the PC4 to be even and straight on both covers. Next, I covered the remainder of the boards with book cloth. Then I trimmed the turn-ins, infilled the boards, and attached the text block. After pressing the book with jointing boards, I attached the labels, which were pre-coated with Klucel G to prevent the ink from smearing (Summer 2009).

The above image on the left shows the finished product and the right depicts the stability of the text block after treatment. The below images are additional before and after examples of recased books. These book were bound entirely in book cloth (2008).