Maroquin, chagrin, basane, veau: identifying binding leathers

Morocco leather, shagreen, sheepskin, calf: four names for four animals, four treatments, four lifespans. When faced with a bound book, knowing how to read the leather changes everything. One moves from 'old brown binding' to a diagnosis of period, quality, and price. Here is the method we use at La Librairie Antique to identify the leather of an old binding in a matter of seconds.

Why the leather of a binding tells the story of the book

A bookseller handling an old book rarely looks at the title first. They look at the leather. An 18th-century red morocco binding does not belong to the same library as a Restoration-era sheepskin with visible grain, and the value can vary by a factor of ten for two copies of the same text. The hierarchy has been established since the 17th century and remains valid on the market: morocco > calf > shagreen > sheepskin. Each hide comes from a different animal, undergoes different treatments, and ages differently.

Two reflexes before any examination. First: place the book flat under raking light. The grain stands out when the light comes from the side, never from the front. Second: never rub the binding to 'see better'. A 19th-century sheepskin can crumble under the finger. If you are examining an entire collection, read our guide on the anatomy of the old book before handling it.

The morocco: Maghreb goat, king of bindings since the 17th century

Morocco leather is a goat hide tanned with sumac, historically imported from Morocco. Its name was fixed in French in the 16th century. It is the noble leather of bibliophile bindings. The grain is regular, raised, formed of tight, small dots. It is called 'crushed grain' when very fine, 'long grain' when the markings are pronounced. It takes gilding better than any other leather, holds bright dyes (red, lemon, olive, midnight blue) and survives centuries without deteriorating if humidity has been controlled.

Three common subcategories. Levant morocco, thick hide of adult goat from Asia Minor, with very coarse grain: this is the leather used for luxury 18th-century bindings, favoured by collectors at the court of Louis XV. Cape morocco, imported from South Africa from the 19th century onwards, has an even more pronounced grain. Niger morocco, with its irregular grain and elastic epidermis, is making a comeback among contemporary bookbinders. The great 19th-century binders — see our article on Trautz, Cuzin and Marius-Michel — worked almost exclusively in morocco.

To the naked eye, morocco can be identified by three signs: raised grain visible in raking light, the brilliance of the gilt even on two-and-a-half-century-old copies, and deep colours (an 18th-century red morocco remains red, whereas sheep leather turns a chocolate brown). Red was dominant in the 18th century for a social reason: the colour of royal bindings, of financiers’ libraries, of diplomatic gifts. My personal view: if you are going to collect just one type of old leather, this is the one. No other ages so well.

Calf: young bovine, smooth leather, the quintessential 18th-century binding material

Binding calf comes from a bovine under six months old, most often oak-tanned. It is the most widely used leather in France between the 16th and 18th centuries, even outstripping morocco in volume. Its grain — the outer surface of the leather — is fine, matte, almost satin-like, with no visible grain. This lack of grain immediately distinguishes it from morocco and shagreen.

Calf has spawned an entire family of decorative effects. Glazed calf: polished to a high gloss by pressing, used especially after 1750. Marbled calf: mottling achieved by spraying acid or corrosive dye, fashionable from the late 17th to the late 18th century. Tree calf: veining imitating roots or sawn timber — typical of the period 1780-1830. Scaly calf: fish-scale pattern, rarer. Blond or fawn calf: untanned, the natural colour of the skin.

The weakness of calf is its acidity and sensitivity to moisture. Many 19th-century calf bindings suffer from “red rot”: a powdery red-orange disintegration caused by unstable tannins and industrial pollution. On Restoration marbled or tree calf, the acid used for decoration has often eaten into the leather itself. See our guide conservation and humidity for stabilising fragile copies, and our advice on foxing and brown spotting for the paper defects that often accompany these bindings.

Shagreen: mechanically granulated goat, the hallmark of the 19th century

The word chagrin comes from the Turkish sağrı, which originally designated the croup of the donkey, mule or onager (a wild equid from Asia). Chagrin was therefore historically an equid skin. Since the mid-19th century, binding chagrin has referred to goat skin whose grain has been enhanced by mechanical granulation: the damp skin is worked with a palm tool or cork to obtain round, tight, larger and more regular grains than those of natural morocco.

Joseph Thouvenin, one of the great bookbinders of the early 19th century, is often credited with having first hand-chagrined leather. The technique became industrialised around 1830. From the July Monarchy onwards, chagrin invaded French editorial production for bourgeois luxury editions, whereas morocco remained reserved for collector’s copies. It is found massively on Hetzel bindings in their “demi-chagrin” variants and on fine Charpentier, Lévy and Lemerre copies.

Chagrin is distinguished from morocco by a grain that is rounder, more uniform, and often thinner. It is stiffer to the touch and more brittle at the hinges when dry. Its bibliophile quality remains inferior to that of morocco but clearly superior to that of sheepskin. Practical advice: if a bookseller offers you a 19th-century “full-chagrin binding” for between €80 and €200, that’s fair. Beyond that price, check that you are not being sold chagrin at morocco prices.

The sheepskin: sheep, poor leather, short lifespan

Sheepskin is a vegetable-tanned sheep skin. It has been the economical leather of French binding since the 16th century: in the classical period, three to five times cheaper than morocco. It covered the vast majority of schoolbooks, legal, religious and modest library books. Its grain is barely visible, sometimes almost smooth. It is chiefly recognised by its fragility: it cracks at the joints, flakes on the surface, turns dark brown and then black when exposed to light and pollution.

Sheepskin comes in several finishes: natural (light brown), marbled, root-patterned, speckled, tawny. In the 19th century, root-patterned or speckled effects were achieved by spraying with metallo-gallic ink. This ink — the same used in manuscripts — often deeply degraded the leather. Many Restoration sheepskin bindings now reach the market in an advanced state of disintegration.

At a glance, sheepskin can be identified by three signals: a matte surface without marked grain, surface cracks (the characteristic craquelure), and a light weight compared to calf or morocco. On today’s market, a 19th-century sheepskin binding in good condition is generally worth two to five times less than a calf binding of the same period for the same text. This is no reason to dismiss it: sheepskin has preserved hundreds of thousands of texts that no collector would have had bound in morocco.

Comparative chart: identifying the four leathers in 30 seconds

Five-step identification method

1. Oblique lighting. Place the book flat, use a side lamp. The grain becomes immediately visible. No visible grain = calf or sheepskin. Visible raised grain = Morocco or shagreen.
2. Grain regularity. Morocco: irregular, natural grain that varies by area of the spine. Shagreen: round, mechanically uniform grain. If it looks too regular to be true, it’s shagreen.
3. Feel of the boards. Calf: satiny, matte, dense. Sheepskin: dry, sometimes powdery, lighter. Touch the corners: sheepskin crumbles, calf resists.
4. Condition of the hinges. Multiple horizontal cracks = sheepskin. Rare cracks only at hinges = calf. Intact hinges after 200 years = almost certainly Morocco.
5. Colour and gilding. Deep intact red and bright gilding after two and a half centuries = almost certain Morocco. Uniform brown-black and tarnished gilding = aged sheepskin. To confirm, cross-reference with the full terminology guide.

Three pitfalls to know before judging a leather

First pitfall: shagreen sold as Morocco. Many 19th- and 20th-century catalogues described shagreen as “Morocco” to inflate value. If the grain is too regular, perfectly aligned, it’s granulated shagreen. This confusion dates back to 1850 and persists among some auctioneers.

Second trap: the dye-tanned sheepskin (basane) meant to resemble calf. In the 19th century, many sheepskins were given a varnish or glaze to mimic calf. The reliable test remains the weight and feel of the corners. Sheepskin remains light and brittle, regardless of surface treatment.

Third trap: the half-binding. When the spine is leather and the boards are paper or calico, never judge the book solely by the spine. The spine may be in morocco, while the boards are simple marbled paper. See our article on 19th-century half-bindings and cardboard bindings for the full terminology.

FAQ — binding leathers

How can I tell if a binding is genuine morocco or imitation shagreen?

Examine the grain under a loupe with raking light. Genuine morocco has a naturally irregular grain, with variations depending on the area of the spine. Granulated shagreen shows a mechanically uniform grain, perfectly aligned. If the regularity seems too perfect, it is shagreen. Also cross-reference with the date: before 1830, mechanical granulation did not exist in series.

Is a damaged sheepskin binding worth anything?

Yes, but the value depends on the text, not the leather. A Restoration-era sheepskin on a common text will be worth little. The same sheepskin on a 17th-century first edition, even cracked, may be worth several hundred euros. Before any appraisal, read our method for appraising an old book.

Should a calf binding affected by red rot be restored?

Red rot cannot be "cured." It can be stabilised with liquid leather or microcrystalline wax consolidation, applied by a conservator. For a common copy, it is better to accept the patina and limit handling. See our guide on when to entrust an old book to a conservator.

Why is red morocco so prevalent in the 18th century?

For social reasons. Red was the colour of royal bindings and libraries of financiers. Red morocco signified the owner’s status even before the title was read. The court of Louis XV made it a standard for diplomatic gifts and presentation copies.

Can old leather be maintained by oneself?

With caution. Gentle dusting with a soft brush and storage in a stable environment (18–20 °C, 50–55% humidity) is sufficient for most copies. Avoid modern shoe polishes, commercial grease products, and aerosol "liquid leather." When in doubt, do not touch and consult our conservation guide.