A good notebook should flop open on your desk, ready for you to start writing. You should never have to squash, force or prop it open in order to get to work.
Traditionally, books were made in thread-sewn sections. And when cheaper alternatives came along (primarily designed for magazines and paper-back novels), these binding methods were used to cut costs on notebooks too. But this overlooked a crucial distinction between books designed to be read, and books designed to be written in.
Mark+Fold has always been about making notebooks properly, so they will feel wonderful to use every day.
A section-sewn book is made up folded booklets or 'signatures.' Each made from a single sheet of paper, folded in half, and in half again, and so on, until it reaches the right size. This means the pages in each section are integrally joined, and will not come loose.
The folded signatures are sewn together with thread, creating a strong, flexible spine.