Difference between revisions of "Redwood"

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[[File:image4_californiaredwood.jpg|thumb|Redwood
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[[File:image4_californiaredwood.jpg|thumb|Redwood ''Sequoia sempervirens'']]
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''Sequoia sempervirens'']]
 
 
== Description ==
 
== Description ==
  
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A soft, red coastal tree, ''Sequoia sempervirens'', found within 30 miles of the Pacific coast in northern California and southern Oregon. Redwoods are the tallest living trees and soome are more than 2000 years old. The redwood tree produces of lightweight, spongy wood that has a straight grain. The strong, durable wood is used for bridges, boxes, lumber, shingles, siding, fencing, and decking. Natural tannin dyes in the wood tend to cause brown stains in paint films. Redwood is resistant to decay and insect attack. It significantly expands and contracts with changes in humidity. Peak lumbering years were 1910-1930.
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A soft, red coastal tree, ''Sequoia sempervirens'', found within 30 miles of the Pacific coast in northern California and southern Oregon. Redwoods are the tallest living trees and some are more than 2000 years old. The redwood tree produces of lightweight, spongy wood that has a straight grain. The strong, durable wood is used for bridges, boxes, lumber, shingles, siding, fencing, and decking. Natural tannin dyes in the wood tend to cause brown stains in paint films. Redwood is resistant to decay and insect attack. It significantly expands and contracts with changes in humidity. Peak lumbering years were 1910-1930.
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[[File:20_Redwood.jpg|thumb|Redwood
 
  
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(''Sequoia sempervirens'')]]
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[[File:20_Redwood.jpg|thumb|Redwood (''Sequoia sempervirens'')]]
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
 
Sequoia sempervirens; sequoia pine; California redwood; humbolt redwood; rødtræ (Dan.); Küstenmammutbaum (Deut.); secuoya (Esp.); séquoia à feuilles d'if (Fr.); séquoia toujours vert (Fr.); sequoia (It.); kustmammoetboom (Ned.); sequóia (Port.); Amerikansk sekvoja (Sven.)
 
Sequoia sempervirens; sequoia pine; California redwood; humbolt redwood; rødtræ (Dan.); Küstenmammutbaum (Deut.); secuoya (Esp.); séquoia à feuilles d'if (Fr.); séquoia toujours vert (Fr.); sequoia (It.); kustmammoetboom (Ned.); sequóia (Port.); Amerikansk sekvoja (Sven.)
  
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== Other Properties ==
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== Physical and Chemical Properties ==
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Tree height reaching to 112 m with truck diameter of 7m. Bark = thick, deeply furrowed, and resistant to fire and fungus.  Leaves= needles (15-25 mm).  Cones=ovoid (15-32 mm long) with spirally arranged scales.
 
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Specific gravity = 0.37-0.38.
 
  
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{| class="wikitable"
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* Height reaching to 112 m with truck diameter of 7m.
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|-
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* Bark = thick, deeply furrowed, and resistant to fire and fungus. 
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! scope="row"| Density
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* Leaves= needles (15-25 mm). 
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| 28-50 ppcf
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* Cones=ovoid (15-32 mm long) with spirally arranged scales.
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|}
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* Specific gravity = 0.37-0.38.
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* Density = 28-50 ppcf
  
 
Paper fiber type: softwood. Using transmitted light microscopy, fibers are identified by the presence of large, uniform-sized taxodiod pits 3+ across. Fibers are wide. Appearance with [[Graff "C" stain]]: varies with pulping and bleaching. Average dimensions of fibers: length 7.0mm, width 60-65μm. Common pulping method: [[kraft process|kraft]] and [[sulfite process|sulfite]].
 
Paper fiber type: softwood. Using transmitted light microscopy, fibers are identified by the presence of large, uniform-sized taxodiod pits 3+ across. Fibers are wide. Appearance with [[Graff "C" stain]]: varies with pulping and bleaching. Average dimensions of fibers: length 7.0mm, width 60-65μm. Common pulping method: [[kraft process|kraft]] and [[sulfite process|sulfite]].
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</gallery>
 
</gallery>
  
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== Sources Checked for Data in Record ==
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==Resources and Citations==
  
 
* F. H. Titmuss, ''Commercial Timbers of the World'', The Technical Press Ltd., London, 1965
 
* F. H. Titmuss, ''Commercial Timbers of the World'', The Technical Press Ltd., London, 1965
  
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* External source or communication  Comment: California Redwood Association, San Francisco, CA: air-dry weight = 30 pcf
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* California Redwood Association, San Francisco, CA: air-dry weight = 30 pcf
  
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* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Coast_Redwood (Accessed Nov. 9, 2005)
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* Wikipedia: http://en.wikipedia.org/wiki/Coast_Redwood (Accessed Nov. 9, 2005)
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 657
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 657

Revision as of 09:41, 13 October 2020

Redwood Sequoia sempervirens

Description

A soft, red coastal tree, Sequoia sempervirens, found within 30 miles of the Pacific coast in northern California and southern Oregon. Redwoods are the tallest living trees and some are more than 2000 years old. The redwood tree produces of lightweight, spongy wood that has a straight grain. The strong, durable wood is used for bridges, boxes, lumber, shingles, siding, fencing, and decking. Natural tannin dyes in the wood tend to cause brown stains in paint films. Redwood is resistant to decay and insect attack. It significantly expands and contracts with changes in humidity. Peak lumbering years were 1910-1930.

Redwood (Sequoia sempervirens)

Synonyms and Related Terms

Sequoia sempervirens; sequoia pine; California redwood; humbolt redwood; rødtræ (Dan.); Küstenmammutbaum (Deut.); secuoya (Esp.); séquoia à feuilles d'if (Fr.); séquoia toujours vert (Fr.); sequoia (It.); kustmammoetboom (Ned.); sequóia (Port.); Amerikansk sekvoja (Sven.)

Physical and Chemical Properties

  • Height reaching to 112 m with truck diameter of 7m.
  • Bark = thick, deeply furrowed, and resistant to fire and fungus.
  • Leaves= needles (15-25 mm).
  • Cones=ovoid (15-32 mm long) with spirally arranged scales.
  • Specific gravity = 0.37-0.38.
  • Density = 28-50 ppcf

Paper fiber type: softwood. Using transmitted light microscopy, fibers are identified by the presence of large, uniform-sized taxodiod pits 3+ across. Fibers are wide. Appearance with Graff "C" stain: varies with pulping and bleaching. Average dimensions of fibers: length 7.0mm, width 60-65μm. Common pulping method: kraft and sulfite.

Additional Images

  • Redwood burl (Sequoia sempervirans)

  • Redwood

  • Redwood paper fibers stained with Graffs "C" stain

  • Redwood paper fibers stained with Graffs "C" stain

Resources and Citations

  • F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965
  • California Redwood Association, San Francisco, CA: air-dry weight = 30 pcf
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 657
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937
  • 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.

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