Journal · From the Bench
Vegetable tanned vs chrome tanned
Published 9 October 2026 · Gordon Mielke
How each tannage is made, how it feels, how it handles rain and ages, and what the rules actually say about chromium VI.
Every hide that lands on my bench in East Vancouver has already been through the most important step in its life: tanning. Tanning is what turns a raw, perishable skin into leather that lasts. The two big families are vegetable tanning and chrome tanning, and the choice between them shapes how a wallet feels on day one, how it handles Vancouver rain, and how it looks in ten years. Here's the difference, with the facts taken from conservators and the tanners themselves rather than marketing copy.
What tanning actually does
Raw hide is mostly protein fibre. Left alone it rots when wet and turns hard and brittle when dry. Tanning locks those fibres into a stable, flexible material. The tanning agent is what differs, and it changes almost everything downstream: colour, stiffness, how the leather takes a stamp or a burnished edge, and how it ages.
Vegetable tanning: the slow, traditional way
The Canadian Conservation Institute (CCI), the federal body that advises museums on caring for artifacts, describes vegetable tanned leather as being produced by immersing prepared skins in a series of tanning liquors made from tannin-rich vegetable matter (bark, leaves and twigs) in water. Once tanning is complete, oils or fats are often worked in to give the leather the flexibility it needs for use or further manufacturing.
The Genuine Italian Vegetable-Tanned Leather Consortium, which certifies vegetable-tanned leather made in Tuscany, calls it the most traditional and recognisable tanning method, with origins in prehistory. It describes a slow process based on natural tannins from trees and plants, and notes that the tannins' innate colours give warm tones that tend to intensify with time and daily use.
What that means in your hand
- It starts firm. Veg-tan has body. That's why it holds a crisp fold, a clean pocket edge and a deep stamped maker mark.
- It takes tooling and burnishing. The edges can be sanded and burnished smooth rather than painted.
- It changes colour. The open surface darkens with light, skin oils and handling. That's patina, and it's covered in detail in what is patina on leather.
- It marks with water. Undyed veg-tan can spot if it gets splashed, which matters in a city with our rainfall.
Chrome tanning: soft, fast and water-resistant
CCI describes mineral tanning as producing strong leathers with a high resistance to moisture, made with mineral salts such as chrome and zirconium salts, and in use since the turn of the twentieth century. It also gives a useful identification tip: chrome tanned leathers can sometimes be identified by a blue-green line on a cut edge.
What that means in your hand
- Soft from day one. Chrome-tanned leather usually needs little or no break-in.
- Handles water better. The moisture resistance CCI describes is why chrome leathers are common in footwear and outerwear.
- Colour is more stable. It changes less dramatically with age than natural veg-tan.
- Edges behave differently. Softer chrome leathers don't burnish the same way firm veg-tan does, so edges are often finished differently.
Vegetable tanned vs chrome tanned: side by side
| Vegetable tanned | Chrome tanned | |
|---|---|---|
| Tanning agent | Tannins from bark, leaves, twigs (CCI) | Mineral salts such as chrome (CCI) |
| Feel when new | Firm, structured | Soft, supple |
| Water | Can spot and darken when wet | High moisture resistance (CCI) |
| Ageing | Warm tones that intensify with use (Consortium) | More stable colour |
| Edge finishing | Sands and burnishes well | Usually finished differently |
| How to spot it | Even, tan-to-brown cut edge | Sometimes a blue-green line on a cut edge (CCI) |
| Long-term risk | Some tannins prone to "red rot" in old leather (CCI) | Chromium VI content is regulated in some markets |
Neither one is simply better. The vegetable tanned vs chrome tanned decision comes down to what the piece has to do and how you want it to age.
Safety, chromium VI and what the rules say
You'll see claims online that chrome-tanned leather is dangerous. The picture is more specific than that. According to the EU regulation on the subject, chromium III compounds are added in some tanning processes to cross-link the collagen in the hide, and chromium VI can form in leather through oxidation of that chromium III. Chromium VI is the concern, because it can cause allergic skin reactions. The European Union restricts it: Commission Regulation (EU) No 301/2014 sets a limit of 3 mg/kg (0.0003% by weight) of chromium VI in the total dry weight of leather in articles that come into contact with skin. The regulation's own reasoning notes that 3 mg/kg is the determination limit of the EN ISO 17075 test method, and that the threshold is expected to substantially reduce new chromium VI-related allergic dermatitis cases from leather articles.
That's an EU rule, not a Canadian one, but it shows the issue is a specific contaminant that's tested for, not chrome leather as a whole. The Tuscan vegetable-tanned leather consortium, for its part, states that its trademarked leather does not contain chrome VI, azo dyes, nickel or PCP.
And red rot on the veg-tan side
Vegetable tanning has its own long-term weak point. CCI notes that depending on the type of tannin, vegetable tanned leather may be prone to red rot, a degradation that eventually produces a red, powdery surface. It's mostly a problem for old leather in poor storage, which is a good reason to store leather properly between seasons.
Which tannage I use, and for what
For me, vegetable tanned vs chrome tanned is a choice I make per piece, not once for the whole shop. At Rogue Artisan I work with two leathers: full-grain vegetable-tanned leather and Horween Chromexcel. Each hide is checked by hand before it's cut.
- Full-grain veg-tan for pieces that need structure and that you want to age visibly: bifold and long wallets, card holders, field notes covers and belts.
- Chromexcel when you want a softer, oilier hand and better tolerance for weather from day one. It has its own entry: Horween Chromexcel explained.
If you're unsure which suits you, think about how you carry. A wallet that rides in a back pocket and gets rained on during a bike commute is a different job from a card holder that lives in a jacket. Both leathers are full-grain, which matters more than most labels; see full-grain vs genuine leather for why.
Want help choosing? Every piece is made to order, so the leather is part of the conversation. Call (250) 719-1332 or email rogueartisan@outlook.com.
Frequently asked questions
What is the difference between vegetable tanned and chrome tanned leather?
Vegetable tanned leather is made with tannins from bark, leaves and twigs and starts firm, then darkens with use. Chrome tanned leather is made with mineral salts such as chrome, is soft from the start, and has high resistance to moisture.
How can you tell if leather is chrome tanned?
The Canadian Conservation Institute notes that chrome tanned leathers can sometimes be identified by a blue-green line on a cut edge.
Is chrome tanned leather safe?
The concern is chromium VI, which can cause allergic skin reactions. The EU limits chromium VI to 3 mg/kg of the dry weight of leather in articles that contact skin, under Regulation (EU) No 301/2014.
Does vegetable tanned leather get damaged by water?
Undyed veg-tan can spot and darken when it gets wet, while chrome tanned leather has higher moisture resistance. Dry wet veg-tan slowly at room temperature, never on a heater.
What leather does Rogue Artisan use?
Full-grain vegetable-tanned leather and Horween Chromexcel, each hide checked by hand in the East Vancouver studio.