Learn · Glossary
Bookbinding has a vocabulary of its own. Search or browse clear definitions of the terms used to describe a book’s structure, materials, tools, and construction. Selected entries expand into illustrated guides.
Any of the glues and pastes used in binding, commonly PVA, methyl-cellulose, wheat or rice starch paste, or mixtures. Working time, flexibility, moisture, and reversibility guide the choice.
Related: PVA · Paste · Methyl cellulose
A pointed tool used to pierce sewing stations in signatures and create controlled holes in paper, board, or other materials.
A suitable sharp piercing tool may work for an early project, but control, hole size, handle comfort, and safe use matter.
Related: Sewing station · Signature
A folder cut from bamboo that creases and smooths without burnishing or marking delicate papers.
A gentle alternative to bone when a surface might scuff.
Related: Bone Folder
Pliers with smooth jaws that pinch up and define the raised bands on a covered leather spine.
Used lightly, after covering, to sharpen the bands.
Related: Raised bands · Spine
Used to condition and strengthen sewing thread: it reduces tangling, adds grip, and helps knots hold.
How much to apply, and why waxed thread behaves so differently.
Related: Thread
The stiff sheet material, commonly binder’s board or greyboard, that forms the front and back covers of a hardcover book.
Cut board with the grain running head-to-tail so the covers stay flat.
Related: Square (Anatomy) · Grain direction · Case · Cover
A large lever-blade cutter for cutting board and paper cleanly and square.
Mind your fingers; the blade is heavy and very sharp.
Related: Board · Cutting Mat
A smooth hand tool used to create crisp folds, crease paper, shape materials, smooth adhered surfaces, and work cloth or paper into joints. It is one of the first specialized tools many bookbinders choose to own.
A clean, smooth substitute may work for limited tasks, but avoid sharp edges or materials that can mark or polish paper unexpectedly.
Related: Signature · Turn-in · Hinge · Teflon folder
A book is an assembly of a few simple parts, each with a name. The text block is the stack of folded, sewn pages. The case is the cover built around it, two boards joined by a spine piece and wrapped in one covering. The two are brought together at the joints, where the covers hinge open and closed.
From the outside you name the edges and features: the spine at the back, the fore edge opposite it, the head at the top and the tail at the bottom, and the small squares where the boards stand proud of the pages. On the inside, the endpapers, the mull, and the spine linings do the quiet work of holding the case to the text block. Nearly every other term in this glossary is one of these parts, seen up close.
Every hardcover, case bound book shares this same anatomy, from a paperback rebound in cloth to a fine leather binding.
Naming the parts lets you describe a book precisely, follow a set of instructions, and understand what a repair actually involves. It is the shared vocabulary the rest of the craft is built on.
You do not need to learn all of it at once. Start with the spine, the boards, and the joints, the three you will name most often, and the rest will fall into place.
Related: Text block · Case · Spine · Joint · Square (Anatomy) · Endpaper
A covering material designed or prepared for book use. The backing and surface help it accept adhesive while limiting strike-through and supporting durable handling.
Buy cloth prepared for books; ordinary fabric needs backing so paste won't strike through.
Related: Book Cloth · Turn-in · Cover
A hard rubber roller for pressing down adhered materials and driving out air and lumps for a smooth, even bond.
Roll from the center outward; wipe it clean before adhesive dries.
Related: Adhesive · Book Cloth
Used to apply paste, PVA, adhesive mixtures, color, or other materials. Brush size, stiffness, and fiber type should suit the task.
A clean general-purpose brush may work, but dedicate brushes to compatible materials and clean them promptly.
Related: Adhesive
A heavy, tightly woven cloth with a starch or acrylic fill, prized for durable library bindings.
Great for hard-wearing covers; it frays less and resists soiling.
Related: Book Cloth · Cover
An agate or steel tool for polishing edges, gilt, and leather to a sheen.
Work with light, even strokes; a little heat from friction helps.
Related: Tooling & finishing
A case is the whole cover of a case-bound book, built as its own object: two cover boards and a spine piece, laid out on a single piece of covering material, cloth, paper, or a combination, and wrapped as one unit.
Because the case is made separately, it can be measured, covered, decorated, and pressed flat before it ever meets the pages. Only then is the finished text block attached, glued in by its endpapers and spine linings, a step called casing in.
Everything you see from the outside of most modern hardcover books is the case: front board, back board, and the spine between them.
Building the cover separately from the pages is what makes case binding approachable and repeatable, each part can be made carefully, flat, and square before assembly.
The small, even gaps between the boards and the spine piece are not mistakes, they become the joints that let the covers swing open.
Related: Case binding · Board · Turn-in · Square (Anatomy) · Mull / Super
A binding method in which the cover (case) is built separately from the text block and then glued on, the standard structure of most modern hardcover books.
Related: Case · Mull / Super · Endpaper
Gluing the finished text block into its case by pasting down the endpapers, the final assembly step of a case binding.
Related: Case · Case binding · Endpaper
An ancient exposed-spine, chain-stitch structure that opens completely flat.
Related: Signature · Sewing station
A sharp cutting tool used for paper, cloth, board, and detail work. Blade choice and cutting technique should match the material.
Sharp blades, controlled light passes, a safe cutting direction, and an appropriate cutting surface are more important than purchasing an elaborate knife.
Related: Board · Grain direction
A protective cutting surface that helps preserve blades, protect the workbench, and support accurate cutting.
Use a flat, stable surface designed to tolerate cutting. Avoid surfaces that encourage slipping or damage the blade.
Related: Craft Knife · Metal Ruler
A two-legged measuring tool for stepping off and marking equal distances, squares, margins, and board spacing, without re-reading a ruler each time.
Set them once and walk the points; consistent squares make the whole book line up.
Related: Square (Anatomy) · Board
Endbands are the small bands, often striped silk or cotton over a core, visible at the very top and bottom of a book’s spine. Sewn endbands are worked directly onto the text block and can reinforce the spine ends; stuck-on endbands are decorative strips added with adhesive.
The band at the head is often called the headband; strictly, endbands include both head and tail.
At the head and tail of the spine, in the small gap between the text block and the cover’s spine.
Beyond decoration, a sewn end band supports the spine ends of the text block.. the exact spot where fingers pull a book from a shelf and where damage often begins.
Early projects usually skip endbands or use stuck-on ones. Sewing endbands by hand is a satisfying skill to grow into, not a requirement to begin.
Related: Spine · Text block
Endpapers, also called end sheets, line the inside of the covers and help join the text block to the case. They may be plain, colored, marbled, or decorated, and are both structural and decorative. One half of the folded end sheet is pasted to the inside of the board (the pastedown); the other remains a free page (the flyleaf) facing the text.
The pastedown does the structural work; the flyleaf is decorative, plan the two together.
Related: Pastedown · Flyleaf · Joint · Hinge · Marbled paper
A press that holds the book firmly for spine work and finishing.
Pairs with a tub or bench; protect the book with boards.
Related: Lying press · Tooling & finishing
Heated brass tools, lines, rolls, and decorative units, used to tool designs into a cover.
Test heat on scrap first; too hot scorches leather.
Related: Tooling & finishing · Type holder
The front opening edge of the book, opposite the spine.
Related: Head · Tail · Spine · Book anatomy
Real gold leaf or pigmented foil applied with heat and finishing tools for titling and decoration.
Start with foil on a hot tool, it's more forgiving than loose leaf.
Related: Tooling & finishing · Spine label
Machine-made paper, board, and cloth have a grain: most of their fibers align in one direction. Materials fold cleanly and flex easily along the grain, and resist folding across it.
In most common book structures, grain should run parallel to the spine, from head to tail, in every component: pages, boards, endpapers, and covering material. When grain directions are mismatched, moisture from adhesives makes the layers expand differently, which can cause warped boards, cockled pages, and a book that resists opening.
In every sheet material you use: text paper, decorative paper, board, and cloth all have grain.
Grain direction is one of the few genuinely unforgiving rules in bookbinding. A beautifully sewn book with cross-grain pages will fight the reader every time it opens.
Gently flex a sheet in both directions without creasing it: it bends with less resistance when curling parallel to the grain. Lightly moistening one side of a scrap also works. The paper curls around an axis parallel to the grain.
Plan cuts before cutting. A sheet labeled “long grain” has grain parallel to its long edge; check rather than assume, especially with decorative papers.
Related: Signature · Text block · Board
Reinforcing or repairing a fold with a narrow strip of paper or cloth, often before sewing.
Related: Signature · Japanese tissue
A strong traditional Korean paper made from mulberry (dak) fiber, used for repair, lining, and covering.
Its long fibers make it tough yet flexible, excellent for hinges and mends.
Related: Japanese tissue · Paper
The top edge of the closed book, at the top of the spine.
Related: Tail · Fore-edge · Book anatomy
The flexing area inside the cover where the board meets the spine, often reinforced by the endpaper and spine linings. The outside equivalent is the joint.
Related: Joint · Endpaper · Mull / Super
A fine-toothed saw used to cut shallow kerfs across the spine for recessed-cord sewing stations.
Cut just deep enough to seat the cord.
Related: Sewing station
A decorative side-sewn binding for single sheets, stitched through holes near the spine edge.
Related: Sewing station
The linking stitch made at head and tail that ties each new signature to the ones already sewn.
Related: Sewing station · Signature
A tough, inexpensive paper used for spine linings, hollows, and protective wrappers.
Fine for hollows and wrappers; choose acid-free for anything that stays in the book.
Related: Mull / Super · Spine
Threading the sewing cords (slips) through holes in the boards to attach them, the strong, traditional board attachment.
Related: Board · Sewing tapes & cords
Leather is a traditional covering material valued for its strength, flexibility, and the way it can be pared thin, molded over shape, and tooled. Skin type, tannage, thickness, and paring all affect how it handles and wears.
Start with a forgiving goatskin, and pare the edges thin so they turn cleanly.
A sewing method in which each new signature is linked directly to the one before through its own sewing holes, joining the sections across the spine without separate cords or tapes.
Related: Signature · Sewing station · Kettle stitch
A large press with wooden screws that grips the text block along the spine for backing, edge work, or trimming.
A heavy, versatile tool; boards and clamps can stand in while you learn.
Related: Backing · Text block
A straight measuring and cutting guide. A metal edge is more resistant to damage from a knife than plastic or wood. Also called a straight-edge or metal rule.
Use a ruler with clear markings and a stable edge. A cork-backed or nonslip ruler may improve control.
Related: Grain direction · Square (Anatomy)
An open-weave material applied across the spine of a text block to support attachment and reinforce the connection between the text block and cover in many structures.
Cut it short of head and tail so it tucks neatly under the endpapers.
Related: Case binding · Hinge
An open-weave cotton cloth (a form of super) glued across the spine to reinforce the joint.
Cut it a little short of head and tail so it hides under the endpapers.
Related: Mull / Super · Spine
An inert, archival polyester film used for protective sleeves and enclosures.
Use it to see and protect a page without adhesives touching it.
Related: Release paper
A needle selected for sewing book structures. Length, eye size, point, and thickness should suit the thread, paper, and sewing method.
Some sturdy sewing needles may work. The needle should pass through prepared stations without unnecessarily enlarging or damaging them.
Related: Thread · Sewing station · Signature
A small, powerful press for nipping, briefly pressing work flat, between steps.
A cast-iron nipping press is a great early upgrade.
Related: Pressing · Finishing press
A simple three- or five-hole stitch for sewing a single section, the basis of many booklets.
Related: Signature · Sewing station
Paper is a structural material, not only a surface. Weight, formation, fiber, and finish affect how it folds, sews, takes adhesive, and wears. Text papers, cover papers, and specialty sheets each suit different jobs.
Match paper to the job, and always fold with the grain (see grain direction).
Related: Grain direction · Marbled paper · Endpaper
An early writing surface made from laminated strips of the papyrus plant.
More of historical interest than a working material today.
Related: Paper
Thinning leather at the edges and turn-ins with a knife or spokeshave so it folds without bulk.
Related: Leather · Paring knife · Turn-in
A water-based adhesive category that may include wheat, flour, rice, and other starch-based pastes. Paste generally offers useful working time and repositionability, and its properties vary with ingredients and preparation.
Slower and repositionable, ideal for covering and repair.
Related: Adhesive · Grain direction
A V-shaped cradle that holds a signature open so sewing stations can be pierced evenly.
Mark stations on a template and pierce through the fold.
Related: Sewing station · Awl
A hand tool that trims the edges of a text block square and smooth in the press.
Take many light cuts rather than one heavy one.
Related: Lying press
Polyvinyl acetate adhesive is widely used in bookbinding because it is strong, flexible, and convenient. Formulations vary, and working time, moisture, reversibility, and long-term behavior should be considered.
Fast and strong for cases; only semi-reversible, so keep it off anything you may need to undo.
The ridges running across a leather spine, true bands sit over the sewing cords; false bands are applied for effect.
Related: Spine · Backing · Sewing tapes & cords
A woven ribbon bound in at the head to mark the reader's place.
Anchor it under the spine lining before casing-in so it stays put.
Related: Casing-in · Mull / Super
A fine, replaceable-blade knife for precise cutting and lifting in close and repair work.
Change blades often; a fresh edge is safer than a dull one.
Related: Craft Knife · Lifting knife
An upright frame that holds sewing supports, cords or tapes, taut so signatures can be sewn onto them evenly.
Keeps tension consistent; you can begin with a simple shop-made frame.
Related: Sewing station · Signature
Linen tapes or cords used as the supports that signatures are sewn onto, and in laced bindings laced into the boards.
Tapes suit flexible bindings; raised cords suit traditional leather work.
Related: Sewing station · Lacing-on · Raised bands
A signature is a group of folded sheets nested together to form one section of a book. In many binding structures, multiple signatures are sewn together to create the text block.
The number of sheets in a signature may vary according to paper thickness, folding behavior, binding structure, and the desired appearance and function of the finished book. Too many sheets may create excessive swell or cause the inner leaves to project farther at the fore edge. Fewer sheets create thinner sections and may require more sewing.
Inside the text block. Look at the head or tail of a sewn book and you can often see the folded spines of individual signatures gathered side by side.
Understanding signatures helps a learner plan page count, paper use, sewing, swell, spine shape, and the overall behavior of the text block.
You may see the same unit called a “section” (common in British and traditional workshop usage) or, loosely, a “gathering.” They describe the same thing: one folded, sewable unit of pages.
Related: Folio · Leaf · Page · Text block · Sewing station · Swell
The bound edge of the book where the sections are joined, and the part of the cover that wraps it. A spine may be flat or rounded, and its treatment shapes how the book opens.
Related: Backing · Shoulder · Text block
A separate titling piece, of paper or leather, applied to the spine to carry the title.
Related: Spine · Tooling & finishing
A two-handled blade drawn across leather to pare it thin over a curved sole.
Keep it razor-sharp and take thin passes.
Related: Paring · Paring knife · Leather
A stiff, spring-loaded spine used for ledgers and albums that snaps the book flat when opened.
Related: Spine
The small, even margin by which the cover boards extend beyond the text block at the head, tail, and fore edge, a protective and visual feature set deliberately during case-making.
Related: Board
A measuring and layout tool used to establish and verify right angles when cutting board, paper, cloth, and other components.
A reliable woodworking or drafting square may work well. Accuracy matters more than whether the tool is marketed specifically for bookbinding.
Related: Board · Square (Anatomy)
The extra thickness at the spine created by accumulated sewing thread. Controlled swell is useful, rounding a spine depends on it, while excessive swell distorts the book.
Related: Sewing station · Backing · Spine
The bottom edge of the closed book, at the foot of the spine.
Related: Head · Fore-edge · Book anatomy
A non-stick (PTFE) folder for working over damp or freshly glued surfaces without lifting them.
Reach for it when a bone folder would stick or shine.
Related: Bone Folder
The text block is the book’s pages as a single assembled unit: folded signatures gathered in order and joined, most often by sewing, sometimes with endpapers attached and the spine glued, lined, shaped, or trimmed depending on the structure.
Almost everything else in binding exists in service of the text block: boards protect it, the spine treatment controls how it opens, and the case or cover dresses and defends it.
Between the covers: everything that is a page.
Understanding the text block as its own object explains the order of operations in most bindings: the block is built, shaped, and finished before it meets its cover.
A gauge or calipers for measuring board, paper, and text-block thickness precisely.
Measure the sewn block to size the case accurately.
Related: Board
Thread joins sections and may contribute to structure, flexibility, durability, and appearance. Fiber, thickness, twist, strength, and waxing influence sewing behavior.
Match thread thickness to your paper, and wax it to tame tangles.
Related: Signature · Swell · Sewing station
Decorating a cover with heated tools, blind, or with gold leaf, including titling.
Related: Spine label · Gold leaf / tooling foil · Leather
A handle that grips individual type so titles can be tooled letter by letter.
Line up type carefully; a jig keeps the baseline straight.
Related: Finishing tools · Spine label
Used to keep materials flat, maintain contact during drying, hold work in position, and provide simple pressing pressure.
Heavy books, clean boards with weight on top, or other stable solutions may serve as a beginner press. Protect the work from dirt, texture, moisture, and uneven pressure.
A cooked wheat-starch paste, the reversible, conservation-standard adhesive for repair and covering.
Cook it smooth, strain it, use it fresh, and thin it to the job.
Related: Paste · Adhesive · Methyl cellulose
