Sourcing & Selecting the Hide

The quality of the final leather product begins with the quality of the raw hide. Most leather comes from cattle, but hides from sheep, goat, pig, deer, and exotic animals are also used depending on the intended purpose.

When selecting a hide, craftsmen look for:

• Thickness uniformity — consistent thickness across the hide ensures even tanning
• Minimal scarring — scratches, insect bites, and brands reduce usable area
• Freshness — hides must be processed or preserved quickly after slaughter
• Size — larger hides offer more usable surface for cutting patterns

Curing & Preservation

Raw hides begin to decompose within hours of removal. To prevent this, hides are immediately cured to halt bacterial growth and preserve the collagen structure that gives leather its strength.

The two most common curing methods are:

• Salt curing — the hide is packed in dry salt or submerged in a salt brine for 16–48 hours. This is the most traditional and widely used method.
• Chilling or freezing — used for short-term preservation when hides will be processed quickly.

Properly cured hides can be stored for months before tanning without any loss of quality.

Soaking & Rehydration

Before tanning can begin, cured hides must be rehydrated to restore their natural moisture and flexibility. This is done by soaking the hides in large water baths — sometimes for 6 to 48 hours depending on how dry the hide has become.

During soaking, dirt, blood, salt, and other surface contaminants are also removed. Clean water is essential at this stage — impurities in the water can affect the final color and texture of the leather.

Fleshing & Dehairing

Once rehydrated, the hide goes through two critical cleaning processes:

• Fleshing — removing all remaining fat, muscle, and tissue from the inner (flesh) side of the hide using a fleshing knife or machine. This ensures the tanning agents can penetrate evenly.
• Dehairing — removing hair and the outer epidermis from the grain side. This is done using a lime solution (calcium hydroxide) that loosens the hair roots, after which the hair is scraped away.

After dehairing, the hide is called a “pelt.” The grain surface — now exposed — is what becomes the beautiful outer face of finished leather.

Bating & Pickling

Bating is the process of treating the pelt with enzymes (typically from pancreatic sources) to relax the fiber structure, remove any remaining non-collagen proteins, and produce a softer, more pliable leather. Without bating, leather would be stiff and boardy.

Pickling follows bating and involves treating the pelt in an acidic salt solution (sulfuric acid and salt). This lowers the pH of the hide to prepare it for tanning agents — particularly chrome tanning salts — which work best in an acidic environment.

Tanning — The Core Process

Tanning is the chemical process that permanently transforms raw hide into leather by stabilizing the collagen fibers and making them resistant to decomposition, heat, and water. There are three primary tanning methods:

• Vegetable Tanning — the oldest method, using natural tannins extracted from tree bark (oak, chestnut, mimosa). The hide is submerged in progressively stronger tannin baths over weeks or months. Produces firm, dense leather ideal for belts, saddles, and tooled goods. This is the method used for most Art Craft Zone products.
• Chrome Tanning — uses chromium sulfate salts. Much faster (24–48 hours) and produces softer, more uniform leather. Used for garments, upholstery, and fashion goods.
• Aldehyde Tanning — uses glutaraldehyde or oxazolidine compounds. Produces very soft, washable leather. Common in automotive and chamois leather.

Sammying & Setting

After tanning, the leather contains a large amount of water. Sammying is the process of mechanically pressing or wringing the leather to remove excess moisture — reducing water content from around 70% down to approximately 50%.

Setting out follows sammying. The leather is stretched and smoothed on a flat surface using a setting machine or hand tool to remove wrinkles, even out the grain, and set the leather at the correct thickness before drying.

Splitting & Shaving

Most hides are too thick for direct use and must be reduced to the required thickness. This is done in two ways:

• Splitting — the hide is passed through a splitting machine that slices it horizontally into two layers. The top layer (with the grain) becomes full-grain or top-grain leather. The bottom layer becomes a split, used for suede or lower-grade leather goods.
• Shaving — fine-tuning the thickness of the flesh side using a shaving machine to achieve precise, uniform thickness across the entire hide.

Dyeing & Coloring

At this stage, the leather receives its color. Dyeing can be done in several ways:

• Drum dyeing — leather is tumbled in a rotating drum with dye solution, producing deep, even penetration of color throughout the hide.
• Brush or spray dyeing, dye is applied to the surface only, allowing the natural grain to show through. Common for two-tone and antique effects.
• Hand dyeing — used by craftsmen for custom pieces, applying dye with a wool dauber or brush for artistic control.

Natural leather dyes derived from plants and minerals produce the most authentic, age-worthy colors. Synthetic aniline dyes offer a wider color range and greater consistency.

Fat Liquoring & Conditioning

Tanning and dyeing strip the leather of its natural oils, leaving it dry and brittle. Fat liquoring is the process of re-introducing oils and fats into the leather fiber structure to restore flexibility, softness, and strength.

Fat liquoring agents include natural oils (neatsfoot oil, fish oil, lanolin) and synthetic lubricants. They are applied in a warm drum and penetrate deep into the fiber network, lubricating each fiber so the leather can flex without cracking.

Drying & Staking

After fat liquoring, the leather must be dried carefully. Drying too fast causes stiffness and cracking; too slow risks mold growth. Common drying methods include:

• Toggle drying — the leather is stretched and pinned to frames, then dried in a controlled environment. Produces flat, smooth leather.
• Vacuum drying — leather is placed on a heated plate under vacuum pressure. Fast and consistent.
• Hang drying — traditional method, air-dried naturally. Slower but gentle on the fiber structure.

Staking follows drying — the leather is mechanically worked over a blunt stake or roller to break up stiff fibers and restore softness and drape.

Finishing & Buffing

Finishing is what gives leather its final appearance, texture, and protective coating. This stage includes:

• Buffing — light sanding of the grain surface to remove imperfections and create a uniform texture. Full-grain leather is not buffed; top-grain leather is.
• Applying finish coats — pigments, binders, and lacquers are sprayed or rolled onto the surface to seal the color, add sheen, and protect against moisture and abrasion.
• Embossing or plating — heat and pressure are used to imprint patterns (such as crocodile, ostrich, or floral tooling patterns) onto the surface.
• Glazing — a glass or steel cylinder is pressed against the leather at high speed to create a high-gloss shine.

Cutting & Crafting

The finished leather hide is now ready to be transformed into a product. This is where the craftsman’s skill truly comes into play:

• Pattern cutting — precise templates are traced and cut from the hide, carefully avoiding scars and weak areas.
• Skiving — edges are thinned with a skiving knife so they fold and stitch cleanly without bulk.
• Tooling & carving — while the leather is damp, designs are stamped or carved into the surface using metal tools — a hallmark of Western leather craft.
• Stitching — pieces are hand-stitched using waxed linen or nylon thread with a saddle stitch — the strongest stitch in leatherwork, where each stitch locks independently.
• Edge finishing — edges are beveled, burnished with water and a bone folder, and sealed with edge paint or beeswax for a clean, professional finish.
• Hardware setting — rivets, snaps, buckles, and conchos are set using hand tools or a press.

The result is a handcrafted leather piece built to last decades — one that will age beautifully, carry your story, and outlast anything mass-produced.