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A cut timber block beside a long board, showing end grain and lengthwise grain

Wood: Grain, Construction and Craft

A guide to reading wood in furniture and objects: from solid boards and veneer to Sorrento marquetry, with conservation context for humidity and surface care.

A material with a grain direction

Wood is a porous, cellulose-rich plant material that exchanges moisture with surrounding air. In a furniture piece, species, grain direction, construction and surface finish all affect how the material behaves; the word “wood” alone does not specify those details.1

Solid wood and veneer

A visible wood surface need not be a solid board throughout. The Forest Products Laboratory defines veneer as a thin wood sheet bonded to a solid or reconstituted substrate, usually to improve appearance. That is a different construction from a single solid board; neither label alone tells you whether a piece is well made.2

Sorrento’s inlaid wood tradition

Sorrento inlay work began around 1830 and is connected with ebony carpenter Antonio Damora. The two-colour marquetry used walnut and orange wood, with fine perimeter cuts filled with black stucco. A later example in the Correale Museum collection is the unfinished secrétaire made by master Gargiulo between 1900 and 1910.3

How to read a wooden object

Start with what can be identified: species where documented, solid or veneered construction, joinery, grain, finish and repairs. A Sorrento marquetry surface, for example, uses fitted small contrasting pieces to form a design; it should not be described as a single species or as solid wood without object-specific evidence.3

Movement and conservation

As humidity rises, wood absorbs moisture and swells slightly; as air dries, it releases moisture and shrinks. These movements can crack wood or damage its finish, and veneer can also distort when moisture conditions change. For an older or unfinished object, avoid assuming that a familiar polish or wet-cleaning method is safe; extensive work belongs with a conservator.1,2,4

Sorrento marquetry: surface, substrate, movement

The Correale Museum's inlaid furniture makes a good object lesson because its decorative picture is built from pieces of wood, not simply painted onto a board. Look first for the inlaid surface, then for the supporting structure and its joins. These are distinct parts of one object; changes in humidity can affect wood and old finishes, so an attractive pattern alone cannot dictate cleaning or restoration.1,3

Object part or stageWhat it showsLimit of the clue
Inlaid surfaceSmall wood pieces form a design, as in the Correale collectionNot proof that every Sorrento-style piece is solid wood
Supporting woodSubstrate and joints hold the objectA frontal pattern photo does not show the substrate
EnvironmentLight and humidity affect wood and finishesDo not polish a historical object by generic recipe
1,3

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