Tanning is the process that transforms raw animal hides into durable, usable leather by stabilizing the natural fibers and preventing decomposition. The tanning method plays a major role in how leather feels, bends, ages, accepts color, and performs in different applications. Understanding the differences between tanning methods will help you choose the right leather for your project.
Historically, some of America's most respected vegetable-tanned leathers were produced using methods similar to those employed by the legendary Bona Allen Company of Buford, Georgia. Founded in 1873, Bona Allen became world-renowned for manufacturing premium saddles, harnesses, bridles, and other working leather goods. Their bark-tanned leathers earned a reputation for exceptional durability, consistent quality, and outstanding tooling characteristics—qualities that continue to influence premium vegetable-tanned leathers today.
Another name synonymous with premium vegetable-tanned leather is Hermann Oak Leather Company. Founded in 1881 in St. Louis, Missouri, Hermann Oak has spent well over a century producing some of the finest vegetable-tanned leather in the world. Their leather is still crafted using time-honored tanning methods that emphasize quality over speed, producing hides prized for their consistency, clean grain, and exceptional tooling characteristics.
At Springfield Leather, Hermann Oak has long been one of our most popular and trusted leathers. Being fellow Missourians, we're especially proud to offer leather that's tanned just a few hours up the road from us. Hermann Oak leather is a favorite among professional leatherworkers, saddle makers, holster makers, belt makers, and hobbyists alike because it tools cleanly, molds beautifully, dyes evenly, burnishes exceptionally well, and develops a rich, natural patina with years of use.
Vegetable-tanned leather is generally firmer than chrome-tanned leather and starts out in natural shades ranging from pale tan to light brown. One of its most desirable qualities is its ability to develop a rich patina—a deepening of color and character that occurs naturally through handling, sunlight, oils, and everyday use.
Because vegetable-tanned leather readily accepts moisture, it can be carved, stamped, tooled, molded, formed, and dyed with excellent results. It is the preferred choice for belts, holsters, sheaths, saddlery, notebook covers, wallets, cases, armor, and many other structured leather goods.
One of the reasons vegetable-tanned leather has remained popular for generations is that it allows the maker to leave a personal mark on every project. Whether you're carving intricate floral patterns, stamping a maker's mark, molding a holster, or hand-dyeing a custom belt, vegetable-tanned leather provides a level of versatility that few other materials can match. With proper care, it also develops a beautiful patina over the years, giving each finished piece a unique character that reflects its history and use.
Today, vegetable tanning remains the gold standard for leatherworkers who value craftsmanship, tradition, and the ability to create truly one-of-a-kind pieces. From centuries-old techniques to modern workshops, it's a tanning method that continues to stand the test of time.
Chrome tanning was developed during the 19th century and revolutionized leather production by dramatically reducing tanning time. Instead of plant tannins, chromium salts are used to stabilize the leather fibers, producing leather that is softer, more flexible, and more resistant to water than traditional vegetable-tanned leather.
Chrome-tanned leather is available in an enormous variety of colors, textures, and finishes, making it the most common leather found in garments, handbags, footwear, upholstery, automotive interiors, luggage, and fashion accessories.
Because the fibers remain more flexible, chrome-tanned leather generally does not tool or carve well like vegetable-tanned leather. It excels in applications where softness, drape, and comfort are more important than rigidity or molding ability.
Oil-tanned leather isn't actually tanned with oil. Instead, oils and waxes are heavily infused into the leather during finishing to create a supple, weather-resistant material with a rich pull-up effect.
These leathers are known for their rugged appearance, exceptional durability, and ability to hide scratches and wear through regular use. Oil-tanned leather is commonly used for boots, bags, aprons, tool rolls, work gear, outdoor equipment, and other projects where a broken-in look is part of the appeal.
Because of the heavy oil content, these leathers are generally not intended for tooling or carving.
Some leathers combine multiple tanning methods to capture the best characteristics of each process. These are often referred to as combination tanned, re-tanned, or veg/chrome tanned leathers.
Typically, a hide is chrome tanned first for softness and durability, then re-tanned using vegetable tannins to add body, improve burnishing, and increase its ability to accept molding or finishing techniques. Many premium bag leathers, harness leathers, and work leathers use combination tanning because it balances flexibility with structure.
Pull-up refers to the visual effect created when oils and waxes move within the leather as it bends or stretches. Areas under tension become lighter in color, creating depth, contrast, and a naturally aged appearance.
Every scratch, fold, and bend contributes to the leather's evolving character, making pull-up leathers especially popular for bags, wallets, belts, boots, and rustic leather goods.
After tanning, most leathers receive some type of finish. A finish affects not only the appearance of the leather but also how it feels, wears, and responds to use.
Common finishes include:
Patina is the gradual change in appearance that occurs as leather ages. Exposure to sunlight, natural oils from your hands, moisture, and everyday use slowly deepen the leather's color while adding richness and personality.
Vegetable-tanned leather develops the most dramatic patina, but many pull-up and waxed leathers also become more beautiful with age. Unlike synthetic materials that simply wear out, quality leather often becomes more attractive the longer it is used.
Leather is a natural material, and no two hides are exactly alike. Grain patterns, wrinkles, healed scars, insect bites, stretch marks, brands, neck wrinkles, and slight color variations are all normal characteristics—not defects.
These natural markings are part of what makes genuine leather unique. Rather than diminishing its value, they tell the story of the animal and ensure that every finished project has its own distinctive character.
Leather can be purchased in several different cuts depending on the project you're making and how much leather you need. Different areas of the hide have different characteristics, so understanding these cuts can help you choose the right leather while reducing waste and saving money.
One of the things that makes Springfield Leather different is the way we sell leather. While many suppliers require you to purchase an entire side or hide, we offer many of our leathers by the square foot. That means you can buy only the amount you need for your project instead of paying for leather that may sit on your shelf for months—or even years.
When shopping for leather, you'll often see thickness listed in ounces (oz.). This can be confusing at first because the "ounce" doesn't refer to how much the leather weighs on a scale—it's thickness.
One ounce of leather is approximately 1/64 inch thick, or about 0.4 millimeters (mm). As the ounce number increases, so does the thickness of the leather.
We’ve been making these educational videos to share our wellspring of wondrous leather knowledge and expertise (brought to you by the prestigious video production company, Stupid Dog Productions). We hope you’ll find something here that you didn’t know before or maybe sparks your creativity.
