What Is Vellum? The Ancient Writing Material Still Used in Fine Books

Vellum is prepared animal skin — traditionally calfskin, though the term is sometimes applied to skins of sheep, goat, or other animals — used as a writing, printing, and binding material. It is one of the oldest writing substrates in the Western tradition, predating the widespread use of paper in Europe by more than a thousand years, and it remains in limited use today for the most prestigious applications: legal documents, fine press printing, and luxury bookbinding.

For book collectors, vellum appears in two distinct contexts: as a printing substrate (vellum leaves or entire books printed on vellum rather than paper) and as a binding material (vellum covers wrapping a text block that may be printed on paper). Both uses carry implications for value, preservation, and identification.

Vellum vs. Parchment: Is There a Difference?

In strict historical usage, “vellum” refers specifically to calfskin and “parchment” to sheepskin or goatskin. In modern usage, the terms are often used interchangeably, with “vellum” tending to denote the finer, smoother product and “parchment” the coarser. Some authorities use “parchment” as the generic term for all prepared animal skins and “vellum” for the finest grade.

The practical difference for collectors is quality: true calfskin vellum is thinner, smoother, whiter, and more translucent than sheep or goat parchment. It takes ink more cleanly, holds illumination more brilliantly, and ages more gracefully. The finest medieval manuscripts and the most prestigious copies of incunabula (early printed books) were produced on calfskin vellum.

Modern usage further confuses matters by applying “vellum” to certain types of paper. “Vellum finish” paper is a paper with a slightly rough, toothy surface that resembles animal skin — but it is paper, not vellum, and the two should not be confused. “Japan vellum” is another misnomer: it refers to a smooth, creamy, semi-translucent paper used in fine press printing, not to actual animal skin.

History and Production

The use of animal skin as a writing surface dates to at least the third century BCE. According to tradition (likely apocryphal), parchment was developed at Pergamon (in modern Turkey) when the Ptolemaic rulers of Egypt restricted the export of papyrus. Whether or not this story is accurate, Pergamon gave parchment its name (Latin pergamena).

The production of vellum is a skilled craft. The raw skin is soaked in lime solution for several days to loosen the hair, which is then scraped away. The skin is stretched on a frame and scraped repeatedly to achieve a uniform thickness and smooth surface. It is then dried under tension, creating a material that is remarkably strong, flexible, and receptive to ink.

The quality of the finished product depends on the animal (calfskin is finest, goatskin sturdiest, sheepskin cheapest), the age of the animal (young animals produce finer skins), and the skill of the maker. The best vellum is thin enough to be translucent yet strong enough to withstand centuries of handling.

Vellum as a Printing Substrate

When Gutenberg printed his Bible around 1455, he produced copies on both paper and vellum. The vellum copies — approximately 45 of the total run of about 180 — were the prestige editions, produced for wealthy patrons and important institutions. Vellum copies of the Gutenberg Bible are significantly rarer and more valuable than paper copies.

This pattern continued throughout the incunabula period and into the sixteenth century: printers produced small numbers of vellum copies for their most important customers. These copies were often specially rubricated (decorated with hand-painted initials) and bound in more elaborate bindings.

In the modern era, fine press printers occasionally produce small editions on vellum. The Doves Press, the Ashendene Press, and the Kelmscott Press all printed vellum copies of selected works. These copies are always the most valuable editions of any fine press book, both because of their scarcity (vellum editions typically number in the single digits or low tens) and because of the extraordinary beauty of type on vellum — the ink sits on the smooth surface with a clarity and sharpness that paper cannot match.

Vellum as a Binding Material

Vellum bindings — books bound in vellum covers — are common in books from the sixteenth through eighteenth centuries, particularly in Continental Europe. Italian, Spanish, and Dutch books of this period were frequently bound in limp vellum (flexible vellum covers without boards) or stiff vellum over boards.

Vellum bindings have distinctive characteristics:

Durability. Vellum is extraordinarily durable when properly cared for. Vellum bindings from the sixteenth century can be in better condition than cloth bindings from the nineteenth century.

Sensitivity to humidity. Vellum absorbs and releases moisture readily, and changes in humidity cause it to expand, contract, warp, and cockle. Books in vellum bindings stored in environments with fluctuating humidity develop warped covers — a common and difficult-to-reverse condition issue.

Yapped edges. Vellum bindings sometimes have “yapped” edges — the vellum extends beyond the edges of the text block and folds over to protect the pages. This is a characteristic of limp vellum bindings and is considered a feature, not a defect.

Ties and clasps. Many vellum bindings were originally equipped with leather ties or metal clasps to hold the covers closed and prevent warping. Missing ties and clasps are common and represent minor condition issues.

Identification

Distinguishing genuine vellum from paper (particularly “vellum finish” paper) is straightforward with experience:

Hair follicle pattern. Real vellum shows a pattern of tiny dots — the follicles from which the animal’s hair grew. This pattern is visible under magnification and is absent from paper.

Translucency. Vellum is semi-translucent when held to light. Paper, even very thin paper, has a different quality of translucency.

Texture. Vellum has a distinctive feel — smoother than most papers, with a slight waxy quality. The “hair side” (the exterior surface of the skin) and the “flesh side” (the interior surface) have different textures, with the hair side being smoother and slightly darker.

Behaviour with moisture. Vellum absorbs moisture differently from paper — it becomes pliable and may curl, while paper becomes limp and may disintegrate.

Sound. Vellum makes a distinctive sound when flexed — a crisp, almost metallic rustle quite different from the soft sound of paper.

Conservation Concerns

Vellum requires specific storage conditions:

Stable humidity. The ideal relative humidity for vellum is 50–55% — slightly higher than the ideal for paper. Fluctuations cause warping, cockling, and structural stress. Climate-controlled storage is essential for valuable vellum items.

Temperature. Cool temperatures (16–18°C / 60–65°F) are ideal. Heat accelerates desiccation and can cause vellum to become brittle.

No pressure on warped covers. Flattening warped vellum bindings by placing them under weight can crack the material. Warped vellum should be treated by a conservator, not forced flat.

Light protection. While more light-resistant than paper, vellum can yellow and become brittle with prolonged light exposure.

Market Value

Vellum items command premiums at every level of the market:

• A vellum copy of an incunabulum is worth several times the price of the same text on paper
• A fine press book printed on vellum is typically worth five to ten times the price of the corresponding paper edition
• A book in its original vellum binding, undamaged and unrestored, is more valuable than the same book rebound in modern materials

The premium reflects both the scarcity of vellum editions (always produced in smaller numbers) and the aesthetic and material superiority of vellum as a substrate. A page of type printed on fine vellum — the letters crisp and black against the creamy, slightly luminous surface — is one of the most beautiful things the book arts have produced. For collectors who care about books as physical objects, vellum represents the apex of the craft.