Glossary
Vegetable-tanned leather
Leather tanned with plant-based tannins instead of chemicals, prized for its firmness, natural color, and ability to be tooled or stamped.
Vegetable-tanned leather, often shortened to veg-tan, is tanned using tannins extracted from tree bark, leaves, and other plant matter rather than the chromium salts used in most modern leather. The process is slower, often taking weeks, and produces a firm, dense hide that starts out a pale tan color and darkens with age, use, and sunlight.
Its defining feature is that it can be tooled, stamped, carved, and molded while damp, which is why nearly every carved wallet, belt, or holster starts as veg-tan. It also holds a crisp cut edge that burnishes into a smooth, polished finish, something chrome-tanned leather cannot really do. The tradeoff is that veg-tan is less water resistant out of the box and can stain if it gets wet before it is sealed.
When buying, look for a clear ounce weight and check whether the tannery mentions it is suitable for tooling, since some veg-tan is finished specifically for structural work like belts rather than fine stamping. A common mistake is trying to carve or stamp leather that has not been properly cased, which leaves impressions faint or leaves the tool skipping across a surface that is too dry.