There is no limit to the number of signatures that you can include in your book. The number of signatures will directly correspond to the number of final pages. For example, a book with 10 signatures will have 160 useable interior pages. If you are new to Coptic binding, it’s generally best to start off with fewer signatures. When you get more comfortable with your technique, go ahead and tackle thicker books with additional signatures. [3] X Research source
To make clean cuts, lay a metal or plastic ruler down on the board and then run a utility knife along the edge. This will let you get the size that you want with a smooth outer edge.
These markings are intended to show where the thread will enter and exit the spine of your signatures. You can end up with as many thread holes as you like, but each hole will raise the level of difficulty. You can also space the holes out however you choose. Be aware that the fewer holes you include the looser your interior pages will be. Likewise, too many holes can leave you with a book that may be stiff with difficult to turn pages.
For this example you will end up with a total of six holes in each cover board. They should correspond in location and spacing with the spine markings of the signatures. Try to make each hole as wide as your needle. Holes that are too wide will let the thread slip and holes that are too small will make threading more difficult.
It’s best to use a waxed thread, as it will slide smoothly through the pages and won’t snag. It will also resist aging. This is where you can express a bit of your creativity. Choose a thread color that you enjoy and that matches the cover of the book, as your thread will be highly visible on the spine of the final product. The amount of thread that you start with is really up to you. You want enough to make some good progress, but not enough to get overly tied up. It is possible to re-thread in the middle of binding.
You will see the knot from your thread just outside the lowest interior hole of this signature. When you are finished with this step you should see a completed stitch on the exterior of the spine holding the cover and signature together.
It’s fine to leave the knot visible at this point. When you are finished, go back through and tuck all of the visible knots into the thread strands and cut away any excess with small scissors.
