Sophie Atkinson
Why Coptic Stitch?
Coptic stitch binding takes its name from the early Christian communities in Egypt, where books were sewn this way from roughly the fourth century onwards. It is one of the oldest book structures still in daily use, and it remains one of the most rewarding to make. The defining feature is the exposed spine. Nothing is glued or hidden: the sewing sits proudly on the outside, threaded into a chain of interlocking loops that runs from head to tail and holds each section to the next.
In exchange for that visible spine you get a book that opens completely flat, right back on itself. For sketchers, journallers and anyone who likes to write near the gutter, that flat opening is worth the extra hour of work on its own. It also means you can see exactly how your book is put together, which makes it a wonderful structure for learning.
What You'll Need
You can spend a fortune on bookbinding kit, but a first Coptic book asks for very little.
- Paper for the pages: A4 cartridge paper at 120–140gsm is ideal. Heavier paper gives a more substantial book; anything thinner than 100gsm will feel flimsy and may tear at the sewing holes.
- Thread: waxed linen binding thread, around 18/3 or 25/3. If you don't have any, a length of strong buttonhole thread run over a block of beeswax works beautifully. Avoid ordinary polyester sewing thread — it is too fine and will cut into the paper.
- Needles: a bookbinder's needle, size 18, or a curved needle if you find the straight one fiddly inside a tight fold.
- A piercing awl with a fine, tapered point, plus a piercing cradle or a folded newspaper to protect your table.
- A bone folder for creasing folds and pressing the spine.
- Greyboard at 1.5–2mm for the covers, sold as millboard or bookbinder's board.
- Cover material: bookcloth, a decorative paper, or simply a heavier card if you like a rustic look.
- Finishing kit: PVA adhesive, a flat brush, waste paper, bulldog clips or a heavy weight, a steel ruler, a scalpel and a cutting mat.
Folding, Marking and Piercing
Fold your sheets with the grain, so the spine of the book runs parallel to the paper's grain direction — flex a sheet gently and you will feel which way it wants to bend. Nest four to six folded sheets inside one another to make each signature, then press the fold firmly with a bone folder, working from the centre outwards. Be gentle: a hard scrape burnishes the paper shiny and can split a coated surface.
Aim for eight to ten signatures for a book roughly 2cm thick. Stack them, weight them overnight, then measure the height of a folded signature. Mark your sewing stations — a minimum of 1.5cm in from the head and tail, with the rest spaced evenly between. Four or five holes across a small book, five or six across a larger one, works well.
Make a card template with the stations marked, and use it to prick the same positions onto every signature and both covers. Pierce each signature from the inside out so any paper burr ends up on the outside, where it will not snag your thread, and pierce the covers from the outside in. Keep the awl perpendicular to the fold as you work.
Sewing the Chain
Cut a length of waxed thread roughly three times the height of the book for each signature, plus a generous tail for the first one. Begin with the first signature:
- Push the needle through the top hole from the outside, leaving about 10cm of tail hanging on the outside of the spine.
- Inside the fold, run the thread along to the next hole and push the needle out.
- Outside again, wrap the thread around the span of thread running between the two holes, then push the needle back into the same hole.
- Continue down the signature in this way: travel inside, emerge, wrap the stitch below, re-enter the same hole.
- At the final hole, tie the working thread to the tail with a square knot and trim the ends.
Lay the second signature on top and begin again at the top hole, this time passing the needle through the loop formed by the previous signature's stitch before it enters the paper. At each station, after emerging, take the needle under the link below and push it back through the same hole. The chain forms almost by itself as you go, and the two signatures lock together. Repeat for every remaining signature.
Tension matters more than speed. Aim for snug — the thread should sit in the fold without denting the paper. If your spine starts to bow or the signatures feel loose, you are pulling too hard.
Attaching the Covers and Finishing
Treat each cover as though it were another signature. The front cover is sewn on with the second signature, the back cover with the last one, with the needle passing through the cover hole first and the loops linking the board to the spine in the same way. Keep the cover flush with the head and tail of the text block as you work.
When you reach the end, knot the thread neatly against the spine and dab the knot with a little PVA on the tip of a needle — just enough to secure it, never enough to soak the thread. Press the finished book under a weight overnight to settle the sewing. A light rub of beeswax along the exposed spine, applied sparingly, will keep the thread clean and stop it furring.
Taking It Further
Once the basic structure is familiar, there is plenty to play with. Try double-needle Coptic for a denser, more decorative spine, or swap the greyboard for heavy card to make a soft-covered sketchbook that slips into a pocket. Marbled, stamped or screen-printed cover papers turn a practical object into something worth giving away, and varying your station spacing changes the rhythm of the chain entirely. Start small, sew a few books, and your hands will soon know the pattern better than your notes do.
