This hand tool, typically fashioned from polished animal bone, though sometimes from materials like Teflon or dense plastic, is indispensable in the creation and restoration of books. It is used to create sharp, crisp folds in paper or card stock, burnish surfaces, and aid in adhering materials together smoothly. For instance, it allows a binder to achieve a precise fold when creating a pamphlet or signature for inclusion in a larger book.
The tools significance lies in its ability to enhance the quality and longevity of a bound volume. Properly creased folds result in pages that turn more easily and lay flatter, contributing to the overall aesthetic and user experience. Historically, its use dates back centuries, predating modern adhesive technologies, and demonstrating a fundamental understanding of material manipulation in book construction. Its enduring utility reflects its ability to perform tasks that are difficult to replicate with other instruments.
