Any of several trees from the Picea family native to North America. Spruce trees, in general, have light weight, soft wood with a straight, even grain. The strong wood is easily worked. It is used for musical instrument sounding boards, ladders, cabinets, boxes, paper pulp, and rayon. Examples include: black spruce (P. mariana), blue spruce (P. pungens), Engelmann spruce (P. engelmannii), red spruce (P. rubens), Sitka spruce (P. sitchensis), and white spruce (P. glauca).
Synonyms and Related Terms
Eastern spruce; épicea (Fr.); Schwartztanne (Deut.); picea (Esp.); espruce (Port.); black spruce (Picea mariana); blue spruce (Picea pungens); Engelmann spruce (Picea engelmannii); red spruce (Picea rubens); Sitka spruce (Picea sitchensi); white spruce (Picea glauca)
Paper fiber type: Softwood. Using transmitted light microscopy, fibers are identified by the presence of very small, oval, piceoid ray parenchyma pits, 2-4 across. May show cupressiod or taxodiod features. Ray tracheids are non-dentate. Appearance with Graff "C" stain: varies with pulping method . Average dimensions of fibers: length, 3.4mm width 3.1 μm. Common pulping method: kraft and sulfite.
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 758
- F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965 Comment: Picea glauca density = 23-33 ppcf
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- External source or communication Comment: Northern Pine Manufacturers: air-dry weight = 27pcf
- Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=30-44 ppcf (0.48-0.70 g/cm3)
- Marja-Sisko Ilvessalo-Pfäffli. Fiber Atlas: Identification of Papermaking Fibers (Springer Series in Wood Science). Springer, 1995.