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(Portions reprinted with permission
from museumfurniture.com)
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Pasadena Furniture Bargain Barn
Density (ρ) is defined as the mass (m) contained in a unit volume (V) of the material, both measured at the same moisture content.
;
;
(g.cm-3;
kg.m-3)
Wood is a hygroscopic material, it has the property to attract and retain moisture. Adsorption of moisture increases weight and volume of wood. Volume of wood increases only bellow the saturation point (about 30 % moisture). Another related term is basic density (ρk) defined as the oven-dry weight (m0) / fully swollen volume (Vmax). In the range of 0 and 25 % moisture content, density may be calculated from the relationship:
(kg.m-3)
where
ρw – density at w moisture content
ρ0 – oven-dry density
w – moisture content