Tools of the Trade: How 17th-Century Books are Preserved

If you walked into a professional book restoration studio, you might think you’d wandered into a dentist’s office or a high-end woodshop. It’s a quiet place where people spend hours staring at a single square inch of a 17th-century book. Magazine Today Daily recently took a look at the specific tools and methods used to save vellum bindings from the 1600s, and it’s a lot more technical than just using some archival glue. These books are made of organic materials that are constantly moving and changing. Vellum, which is essentially specially treated animal skin, reacts to the moisture in the air. If the room is too dry, it shrinks. If it’s too damp, it swells. Keeping a book like that in one piece for four hundred years is a minor miracle. One of the most important tools in this work isn't a machine at all. It's a bone folder. It sounds simple—it’s just a shaped piece of polished bone—but it’s essential. Unlike plastic, bone doesn't leave a shiny mark on the vellum or paper when you use it to make a crease. It’s smooth enough to apply pressure without abrading the surface. When you’re dealing with 17th-century signatures (the groups of folded pages that make up a book), you have to be incredibly careful. If you fold them with too much force, the old fibers will just snap. The bone folder gives the person the 'feel' they need to do the job right. It’s all about the tactile feedback. You can’t get that from a machine.

Who is involved

Saving a book is rarely a one-person job. It requires different types of knowledge working together to make sure the artifact survives the process.

The Material Scientist:They analyze the chemical profile of the inks and the type of animal skin used. They figure out if the ink will melt if it gets wet.
The Conservator:This is the person doing the 'surgery.' They use the micro-spatulas and bone folders to physically repair the damaged parts.
The Historian:They make sure the repairs are historically accurate. You wouldn't want to use a 19th-century sewing style on a 17th-century book.

The Mystery of the Beeswax Thread

When it comes time to put the book back together, we talk about 're-sewing the signatures.' In the 1600s, books were sewn onto thick cords made of linen or hemp. Over time, those cords rot or break. To fix them, we use new linen thread that has been treated with beeswax. Why beeswax? Well, have you ever tried to pull a dry string through a tight hole? It creates friction and heat. That friction can actually saw through the old, fragile paper of a 17th-century book. The beeswax acts as a natural lubricant. It lets the thread glide through the holes without snagging or tearing. Plus, beeswax doesn't go rancid or damage the paper over time. It’s a simple, centuries-old solution that we still use because, frankly, nothing modern works better.

"The goal of a good restoration is to be invisible to the eye but obvious to the touch. The book should feel strong again, even if you can't see the new thread."

Applying the Pressure

Once the sewing is done and the new cover is on, the book goes into a press. But these aren't your average clamps. Custom-fabricated book presses have adjustable platens—the flat plates that squeeze the book. These allow the conservator to apply exactly the right amount of pressure to different parts of the book. Vellum is a 'living' material in a sense; it has a memory of the animal it came from. If you don't press it correctly while the new glues are drying, it will pull and twist the whole book out of shape. We use even pressure to make sure the paper fibers and the vellum skin settle down together. It’s a bit like training a puppy; you have to be firm but gentle, and you can’t rush the process. If you take a book out of the press too early, all that work can come undone in a matter of hours as the vellum starts to curl.

Why Reversibility Matters

Everything we do today has to be able to be undone. In the past, people used 'magic' tapes or heavy industrial glues to fix books, and those things ended up causing more damage than the original problems. Today, we use adhesives like Klucel G and parchment paste because they can be removed with a little bit of moisture or the right solvent. We have to be humble enough to realize that we might not have all the answers. Maybe in fifty years, someone will have a better way to treat 17th-century vellum. By using reversible methods and documented protocols, we’re making sure we don't accidentally ruin a piece of history while trying to save it. It’s about being a good steward of the past for the people of the future.