The Benchwork Behind a 17th Century Restoration

When you walk into a restoration lab, the first thing you notice is the tools. They aren't the kind of things you find at a hardware store. There are tiny metal spatulas, smooth pieces of bone, and heavy wooden presses that look like they belong in a medieval workshop. This is where the physical work of saving a book happens. It is a slow, rhythmic process. You might spend an entire day just cleaning a single spine. It's not fast work. It's not loud work. But it is incredibly precise. One wrong move with a blade and you've lost a piece of history that can't be replaced. No pressure, right? But that is why we train for years to do this. We have to learn the feel of the materials.

Think about the last time you saw a really old book. The pages are usually held together in groups called signatures. These signatures are sewn onto cords that run across the spine. In the 1600s, they used linen thread. Over time, that thread can rot or snap. When that happens, the whole book starts to sag. To fix it, we have to take the book apart and sew it back together by hand. We use fresh linen thread, but we treat it with beeswax first. The wax makes the thread smooth so it doesn't rub against the old paper and tear it. It also makes the thread last longer. It is a simple trick, but it works perfectly. It is the same way they did it hundreds of years ago.

What happened

Here is how a typical 17th-century book gets rebuilt at the bench:

1. Disassembly:We carefully cut the old threads and separate the groups of pages.
2. Cleaning:We use micro-spatulas to scrape away old, crusty animal glue from the spine.
3. Repair:Any torn pages are mended with thin Japanese tissue and reversible paste.
4. Resewing:The pages are sewn onto new cords using waxed linen thread.
5. Pressing:The book goes into a press to make sure everything stays flat and square as it dries.

The tools we use are very specific. Take the bone folder, for example. It is exactly what it sounds like—a flat, polished piece of cow bone. Why bone? Because it is smooth and hard, but it won't scratch or mark the delicate vellum. We use it to make sharp creases in paper and to rub down layers of leather or skin. A plastic tool would get static or leave a weird residue. A metal tool would be too sharp. Bone is just right. Then there are the micro-spatulas. These are tiny, flexible metal tools that let us get under layers of paper that have stuck together. We use them to lift up delaminated layers—that’s just a way of saying the paper is peeling apart like an onion. We have to be very gentle. It is like performing surgery on a patient made of tissue paper.

The Power of the Press

Once the book is sewn and the glue is applied, it has to go into a press. But you can't just squeeze it. If you apply too much pressure, you can crush the fibers of the paper or squeeze the glue out where it doesn't belong. We use custom-fabricated presses. These have heavy wooden or metal plates called platens. They can be adjusted to the millimeter. This even pressure is what gives a book its shape. It ensures the spine is straight and the covers are flat. While the book is in the press, it is slowly drying. This can take days or even weeks. We are waiting for all those chemical bonds to set and for the moisture to leave the materials at a steady pace. If it dries too fast, it will warp. If it stays wet too long, it will mold. It is a delicate balance.