Vegetable Tanning vs Chrome Tanning Explained

Not all tanning methods are created equal. The process used to turn a raw hide into leather changes almost everything about the final product - how it feels, how it ages, how it holds up, and what it costs the planet to make. I work almost exclusively with vegetable-tanned leather, and here's the reasoning behind that, laid out as plainly as I can.

What Is Tanning?

Tanning is what stops a hide rotting and turns it into something you can actually work with. Without it, a hide just decomposes. Whichever tanning agent gets used ends up shaping almost every other characteristic of the finished leather.

Vegetable Tanning

Vegetable tanning - veg-tan - is one of the oldest crafts going, thousands of years old. It uses natural tannins from plant matter: bark, usually oak, chestnut, or mimosa, along with leaves and other botanical sources.

The Process

Hides sit in a series of pits with increasingly concentrated tannin solutions. It's slow - weeks, sometimes months - but that's what lets the tannins fully penetrate the hide and bond properly with the collagen fibres.

Characteristics of Vegetable-Tanned Leather

• Develops a rich patina over time - the leather darkens and deepens with use, becoming uniquely yours.
• Firm and structured - ideal for belts, wallets, holsters, and goods that need to hold their shape.
• Natural, earthy tones - takes dyes beautifully and ages with warmth.
• Biodegradable - made with natural materials, it breaks down at end of life.
• Repairable and long-lasting - with proper care, veg-tan goods can last decades.

Drawbacks

• More expensive due to the time-intensive process.
• Less water-resistant than chrome-tanned leather without conditioning.
• Fewer tanneries worldwide still practise traditional veg-tanning.

Chrome Tanning

Chrome tanning was developed in the late 19th century and now accounts for roughly 80-90% of global leather production. It uses chromium sulphate salts to tan the hide in a fraction of the time.

The Process

Hides are tumbled in large drums with chromium salts. The whole process can be done in as little as 24 hours, which is what makes it so much more efficient for mass production.

Characteristics of Chrome-Tanned Leather

• Soft and supple - naturally more pliable, which is why it's popular for garments and upholstery.
• Consistent colour - easier to dye uniformly across large batches.
• More water-resistant - holds up better in wet conditions without treatment.
• Lower cost - faster production means lower prices at scale.

Drawbacks

• Does not develop a patina - the leather looks largely the same throughout its life.
• Environmental concerns - chromium is a heavy metal, and improper disposal of tannery waste is a real pollution risk.
• Shorter lifespan - chrome-tanned leather tends to degrade faster and is harder to repair.
• Not biodegradable - chromium residues persist in the environment.

Side-by-Side Comparison

	Vegetable Tanned	Chrome Tanned
Tanning time	Weeks to months	24-48 hours
Tanning agent	Plant tannins	Chromium sulphate
Feel	Firm, structured	Soft, supple
Patina	Yes - ages beautifully	No
Durability	Decades with care	Shorter lifespan
Environmental impact	Lower	Higher
Cost	Higher	Lower
Best for	Belts, wallets, structured goods	Garments, upholstery, fast fashion

Why We Choose Vegetable-Tanned Leather

Every piece I make is crafted from full-grain, vegetable-tanned leather. I like making things that last - goods that improve with age instead of falling apart, that can be mended rather than binned, and that leave a smaller footprint behind.

The patina that builds up on a well-used veg-tan belt or wallet tells a story. It's a record of the life it's had with you. That's something no chrome-tanned leather can replicate.

If you're going to invest in leather goods, I think it's worth choosing leather that rewards you for it.