Ponderosa pine
Description
A large pine tree, Pinus ponderosa, native to the western U.S. and Canada. Ponderosa pine produces a white, fine-grain, soft wood that is used for the construction of furniture, millwork, flooring, houses, and ships. Native Americans used its long needles (up to 10') to weave baskets and jewelry.
Synonyms and Related Terms
Pinus ponderosa; western yellow pine; bull pine; silver pine; yellow pine; heavy wooded pine; pin de Ponderosa (Fr.); pinho-de-Ponderosa (Port.)
Working Properties
Ponderosa pines produce a lightweight, hard, fine grained. strong wood. It has a reputation for being easy to work and was often chosen by carvers. The pine was also used for cabinets, furniture and toys.
Chemical and Physical Properties
| Density | 25-28 pcf |
|---|
Paper fiber type: softwood, hard pine. Using transmitted light microscopy, fibers are identified the presence of pinoid pits in irregular groups. Pits may coalesce into one larger pit. Early wood and late wood fibers are distinct. Dentate ray tracheids are present. Appearance with Graff "C" stain: varies with pulping and bleaching. Average dimensions of fibers: length 3.6mm, width 35-45μm. Common pulping method: kraft and sulfite. Can be difficult to distinguish from other hard pines.
Additional Images
Ponderosa pine paper pulp stained with Graff "C" stain
Ponderosa pine paper pulp stained with Graff "C" stain
Sources Checked for Data in Record
- R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 614
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- External source or communication Comment: Western Pine Association, Portland, Oregon: air-dry weight = 28 pcf
- Encyclopedia Britannica, http://www.britannica.com Comment: "pine." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service. 27 Oct. 2004 .
- Marja-Sisko Ilvessalo-Pfäffli. Fiber Atlas: Identification of Papermaking Fibers (Springer Series in Wood Science). Springer, 1995.
- Walter Rantanen. "Fiber ID Course." Integrated Paper Services. June 2013. Lecture.