A leather bag does not begin in a sewing workshop, but much earlier: with a raw hide that is transformed through a series of careful steps into a strong, supple, and durable material. That process is called tanning. It is an age-old craft and, at the same time, the essence of why good leather lasts so long. In this article, we explain how it works and why we consciously choose vegetable-tanned leather.
Why a hide needs to be tanned
An untreated animal hide is not leather. Without processing, it dries out and becomes hard, or it starts to rot. Tanning permanently changes the protein structure of the hide, making the material stable: it no longer rots, remains supple, and can withstand water, heat, and years of use. Only after tanning do we call it leather.
The steps of the tanning process
Although tanneries differ from one another, the craft generally follows the same route. Every step requires skill and patience.
1. Preparation
First, the hide is thoroughly cleaned and stripped of hair, fat, and flesh remnants. This soaking and dehairing creates a clean, even foundation. It is invisible work, but crucial to the quality of the final result.
2. The actual tanning
This is where the magic happens. The prepared hides are placed in baths where tanning agents slowly penetrate the fibers. In vegetable tanning, natural tannins from tree bark, leaves, and plant extracts are used. This is a slow process: it takes weeks rather than hours. That time gives the leather its characteristic strength and warm tone.
3. Drying and finishing
After tanning, the leather is dried, oiled, and finished. During this stage, it acquires its final suppleness and appearance. Skilled craftspeople assess each hide for color, feel, and structure before it is approved for production.
Vegetable tanning versus chrome tanning
There are broadly two methods. Chrome tanning uses mineral salts; it is fast, often taking only a matter of hours, and produces soft, uniform leather. Vegetable tanning uses natural tannins from bark and leaves, a process that takes weeks.
- Time: chrome tanning is fast; vegetable tanning takes weeks.
- Tanning agents: mineral salts versus natural tannins from plants.
- Character: vegetable-tanned leather develops a beautiful patina over the years and becomes more personal with every use.
We consciously choose vegetable-tanned leather. It takes more time, but it produces a more honest, natural material that grows with you.
Full-grain leather: the top layer
The leather we use is full-grain leather: the top, strongest layer of the hide, with the natural grain intact. This top layer is what makes the leather strong and allows it to age beautifully. Small variations in the grain are not flaws, but a sign that you are working with genuine, natural material.
The role of craftsmanship
Tanning is not something you can do at the push of a button. It is human work, where experience and intuition make all the difference. An experienced tanner knows exactly how long a hide should remain in the bath, how much oil the leather needs, and when a hide is ready. This knowledge is often passed down from generation to generation. Our bags are handmade by skilled craftspeople in Kolkata, India, and that craft begins with the selection and treatment of the leather.
Precisely because it is such a slow, careful process, the result is a material with depth. No two hides are exactly alike, and that is precisely the point. Vegetable tanning emphasizes the natural properties of the leather instead of covering them up.
Why this matters for your bag
The tanning process largely determines how your bag behaves: how it feels, how it ages, and how long it lasts. Vegetable-tanned full-grain leather becomes more beautiful with age rather than deteriorating. A slight change in color, a softer sheen, traces of use: they are all part of it and make your bag unique. A bag that you use for years and that keeps getting better is also a more conscious choice than something you replace after one season.
If you want to enjoy it for a long time, proper care helps enormously. In our leather care tips, you can read how to nourish and protect the material. And if you are curious about how this craft translates into our products, take a look at all our bags or go straight to our backpacks. If you have any questions about the material or craftsmanship, please feel free to contact us.
From raw hide to finished leather: it is a slow, artisanal process that deserves respect. And you can see that respect in every bag we make.
