The vocabulary of paper degradation, binding wear, and honest condition reporting. What each term means, what it looks like, and when to use it.
Paper Conditions
Foxing
What it looks like: Scattered brown or reddish-brown spots on paper, ranging from pinhead-size to several millimeters. What causes it: Still debated. The two main theories: (1) fungal growth encouraged by moisture; (2) oxidation of iron particles in the paper. Probably both. How to describe it: "Light foxing to prelims" (common, minor). "Heavy foxing throughout" (significant, affects value). "Scattered foxing, not affecting text" (moderate, reassuring).
Toning
What it looks like: Uniform yellowing or warming of the paper, as if someone held a tea bag over every page. What causes it: Oxidation of lignin in the paper. More common in wood-pulp paper (post-1850) than rag paper. How to describe it: "Pages toned" (general). "Text block evenly toned, as usual for this period" (contextual, honest).
Browning
What it looks like: Darker than toning — the paper has turned distinctly brown, sometimes unevenly. What causes it: Advanced oxidation, often combined with acidity. Common in books from 1850–1950, the era of cheap acidic paper. How to describe it: "Browning to margins" (edges affected). "Pages browned and brittle" (severe, structural concern).
Spotting
What it looks like: Random stains or discolorations that aren't foxing. Could be water, ink, food, or unidentifiable substances. How to describe it: "Occasional spotting" (mild). "Large stain to pp. 45-48" (specific, honest). "Stain of unknown origin to frontispiece" (diplomatic).
Offsetting
What it looks like: A ghost image transferred from one page to its facing page, or from an illustration to the adjacent text page. What causes it: Ink or pigment migration over time, especially when the book is stored closed. How to describe it: "Offsetting from frontispiece to title page" (specific). "Mild offsetting from plates" (general).
Damp staining
What it looks like: Tideline marks — brownish rings or borders where water reached and then dried. What causes it: Water damage. The stain marks the boundary of the moisture. How to describe it: "Damp stain to lower corner of first 20 leaves" (specific). "Evidence of old damp, now dried" (historical, stabilized).
Brittleness
What it looks like: Paper that cracks or chips when handled. Edges may be broken or flaking. What causes it: Advanced acid degradation. The paper has lost its flexibility. How to describe it: "Pages brittle at edges" (marginal). "Paper brittle throughout, handling with care required" (severe).
Binding Conditions
Rubbed
What it looks like: Light surface wear, usually on corners, edges, and spine. The cloth or leather has lost its original texture in spots. Severity: The mildest form of wear. Almost universal in used books. "Slightly rubbed" barely merits mention for books over 50 years old.
Bumped
What it looks like: Corners that have been knocked or compressed, losing their sharp edge. Severity: Minor. "Corners bumped" is one of the most common condition notes. It means someone dropped the book, or shelved it carelessly, or both.
Scuffed
What it looks like: More visible surface damage than rubbing — scratches or abrasions on the binding. Severity: Moderate. More noticeable than rubbing, less severe than torn.
Sunned / Faded
What it looks like: The spine (or exposed cover) has lost color from light exposure. A dark blue cloth becomes pale; a red becomes pink. Severity: Moderate. Spine sunning is extremely common and reduces value for collector-grade copies.
Shaken
What it looks like: The text block has started to loosen from the binding. Pages may move slightly when the book is held spine-down. Severity: Moderate to significant. The book still functions but is heading toward structural failure.
Cocked
What it looks like: The spine leans to one side, usually from being shelved leaning. The book doesn't stand straight. Severity: Mild to moderate. Mostly cosmetic but indicates long-term stress.
Cracked (joint/hinge)
What it looks like: A visible break along the joint (exterior) or hinge (interior) where the cover meets the spine. Severity: Significant. A cracked hinge means the cover will eventually detach.
Detached
What it looks like: The cover is no longer attached to the text block. Severity: Severe. The book needs rebinding or repair.
Worn
What it looks like: General wear beyond rubbing — the binding shows significant use. Severity: Moderate. "Binding worn" is an honest catch-all for books that have been well-used.
Text Block Conditions
Tight
What it means: The text block is firmly bound and doesn't spread easily when opened. Generally desirable, though it can make reading difficult.
Loose
What it means: Pages or gatherings are no longer firmly held. The opposite of tight.
Sprung
What it means: The text block has been forced open too far, damaging the sewing. The book won't close flat.
Tender
What it means: The paper is weakened and tears easily with normal handling.
Dust Jacket Conditions
Chipped
What it looks like: Small pieces missing from the edges, usually the top and bottom of the spine panel.
Torn
What it looks like: Rips in the jacket paper. Can be short tears at folds or long tears across panels.
Price-clipped
What it looks like: The corner of an inner flap (usually front) has been cut off to remove the printed price. Note: Price-clipping indicates the book was given as a gift. It reduces the jacket's completeness and therefore value, but it's so common as to be expected on many mid-20th century books.
Creased
What it looks like: Fold lines in the jacket, usually across the flaps or spine panel.
Soiled
What it looks like: General surface dirt, marks, or discoloration from handling.
Condition Grades (Summary)
| Grade | What it means |
|---|---|
| Fine (F) | As new. No defects. Essentially perfect. |
| Near Fine (NF) | Almost fine — very minor signs of age or handling. |
| Very Good (VG) | Shows some wear but no major defects. A well-cared-for used book. |
| Good (G) | Shows wear and perhaps minor damage. Complete and readable. |
| Fair | Significant wear or damage. A reading copy, not a collector's copy. |
| Poor | Heavy damage. Incomplete, falling apart, or severely damaged. |
For full grading guidance, see Condition Grading.
See also: Condition Grading · Glossary · The Bookseller's Condition Scale (blog)