Custom leather sofas and armchairs: aniline, semi-aniline or protected?

In short. Choosing sofa leather means looking at two things: how much the surface is covered by the finish, and how thick the hide is. Aniline shows the whole grain and is the most natural and the most delicate; semi-aniline adds a light protective veil; protected leather covers the surface and stands up best to light, stains and wear. In a hotel, fire rules matter too, and they apply to the finished sofa, not just the leather.

What is the difference between aniline, semi-aniline and protected leather?

The difference lies in the finish, the layer the tanner applies to the surface of the hide after dyeing.

Aniline leather is drum-dyed with transparent dyes and receives no covering pigment: the natural grain stays fully visible, with its pores, small scars and neck wrinkles. Under the designation rules used by the German leather industry, the surface layer of an aniline leather is no more than a hundredth of a millimetre. It is the softest leather to the touch and the one that ages best, developing a patina with use. It is also the most exposed: it absorbs liquids, marks easily and tends to fade in sunlight.

Semi-aniline leather receives a small amount of pigment — enough to even out the colour and give the surface some protection, not enough to hide the grain. It is the compromise many people choose when they want the look of natural leather with less demanding care.

Protected leather, also called pigmented or finished, has a covering finish that defends the surface completely. The colour is uniform and resistance to light, stains and rubbing is the highest; in return the leather feels less alive and does not develop the patina of aniline.

One boundary worth knowing: for a material to be called leather, the finish must not exceed 0.15 mm. Beyond that it is coated leather; materials made from reconstituted leather fibres, and faux leathers, are not leather.

And what is "spessorata" leather?

This is a different matter, and it is often confused with the finish. Spessorata means the section of the hide is greater — the leather is thicker. It is not a grain and not a finish; it is the amount of material.

That is why it copes best with heavy use. A thicker section deforms less, withstands constant rubbing better, holds the shape of the seat over the years and forgives what a thin leather will not. The grain can then be embossed with a "dollar" print — a pattern of small irregular pebbles that evens out the surface and makes marks and scratches less visible — or left more natural.

Our sample books also include madras and cuoio, chosen with the client according to the piece and the project.

Which leather copes best with everyday use?

The general rule is simple: the more protected the surface and the thicker the section, the easier the leather is to live with; the more natural and the thinner it is, the more attention it needs. An aniline sofa in a bright living room with children or pets will change quickly — a virtue for anyone who loves patina, a flaw for anyone who wants a sofa that always looks the same. Protected and thicker leathers cope better with sun, hands and dark denim.

Colour matters too. Pale shades show dye transfer from clothing more; mid and dark tones are more forgiving. And light matters: no leather likes years of direct sun or sitting next to a radiator.

Which leather for a hotel, a restaurant, a public space?

In a lobby, a hotel bar or a suite, a sofa is used by many people, cleaned often and must stay presentable for years without attention. For these spaces we recommend protected leather in a thicker section: the covering finish stands up to frequent cleaning and staining, the greater thickness stands up to constant use. It is the combination that ages best where nobody has time to look after it. In very high-traffic public spaces, faux leather remains a sensible alternative.

The choice is not only about looks. In Italy, the decree of 9 April 1994 on hotel and hospitality buildings requires upholstered furniture in new properties to be Class 1 IM. Approval comes from a test on the assembled piece — leather, filling, frame and seams together. A certified leather does not make the sofa it covers compliant, as we explain in our guide Fire-rated hotel furniture. In the UK, hotel upholstery usually falls into the "medium hazard" category of BS 7176, which calls for the cigarette and match tests and the crib 5 ignition source of BS 5852.

That is why, on a hotel project, leather is chosen together with everything else. We use Class 1 IM certified leathers when the project requires them, certified fabrics, fire-retardant foam and CARB 2 wood — panels that meet the formaldehyde emission limits of Phase 2 of the California Air Resources Board, the same limits adopted in the United States under TSCA Title VI.

There is one argument that outweighs all others on hotel projects: time. Products that are compliant, already certified and delivered on schedule mean a quick opening, and a hotel that opens sooner starts earning sooner. To plan the dates, see also Hotel FF&E lead times.

And for the home?

At home there is more freedom, because few people use the sofa and its owners look after it themselves. For private homes we recommend aniline and semi-aniline: they are the most delicate leathers, and that is exactly why they give their best in a house. They are the softest, the most natural to the touch, the only ones that truly develop a patina — and in a domestic setting they have the time and the care to do it.

One piece of advice still applies: choose leather from a real, generous sample, looked at in the light of the room where the sofa will stand. A swatch a few centimetres wide does not show the variations in grain and tone that natural leather has across a whole hide.

How do you look after a leather sofa?

A few rules apply to every leather. Keep the sofa away from direct sun and heat sources. Dust with a soft dry cloth; blot spills straight away without rubbing. Avoid solvents, alcohol, household cleaners and products not made for leather. For aniline, which absorbs more, a dedicated protector recommended by the maker helps delay stains. In a hotel, agree the housekeeping cleaning routine with the supplier from the start.

How we work

Brianform was founded in 1982 in Brianza as a maker of leather sofas and armchairs. Wood, marble, metal and upholstery are all worked in-house, so frame, seat and cover of the same piece can be designed to measure. Our seating is in the sofas and armchairs collections; for hotels and residences, our Contract page explains how we handle projects. Brianform and Stoneform are two divisions of the same company: from stone to upholstery the service is complete, with no intermediaries and at lower cost; production is in-house, so there are no unexpected mark-ups. Our showroom is in Cantù; for a project or a quotation, start from our contact page.

Frequently asked questions

Is aniline the finest leather?

It is the most natural and the softest, because it shows the grain without covering it, and it is what we recommend for homes. "Finest" depends on use: in a hotel, a protected leather in a thicker section is the right choice.

What does "spessorata" mean?

That the section of the hide is greater — the leather is thicker. It is why it copes better with heavy use, and why we recommend it for hotels.

Which leather resists scratches and stains best?

Protected leathers with a covering finish, especially in a thicker section and with an embossed grain: the surface is defended and the pattern hides marks.

Does a Class 1 IM certified leather make the sofa Class 1 IM?

No. Approval applies to the assembled piece. See our guide Fire-rated hotel furniture.

Leather or fabric for a hotel?

It depends on the space and the use. Both must meet fire rules together with the rest of the sofa; the difference lies in the expected maintenance and the character of the project.

Talk to us The contract division

The definitions of aniline, semi-aniline and protected leather and the finish thickness limits quoted (a hundredth of a millimetre for aniline, 0.15 mm for a material to be called leather) follow the designation rules in use in the tanning industry. The fire requirements mentioned — Class 1 IM under the Italian ministerial decree of 9 April 1994, with the UNI 9175 test on the composite, and the BS 7176 hazard levels with the BS 5852 ignition sources — are given for information: the requirements applying to any individual project remain the responsibility of the fire safety design and the appointed professional.