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Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Understanding Extractive Bleed

Source: CoatingsTech, March 2010, Vol. 7, Number 3; pp. 48-53; 2010

Author(s)Burke, Edward; Slavik, Norm; Bonura, Tony; Connelly, Dennis; Faris, Tom; Nebelsick, Arnie; Stuart, Brent; Williams, Sam; Wiedenhoeft, Alex

Publication Year: 2010  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-1A

Abstract: Color, odor, and natural durability of heartwood are characteristics imparted by a class of chemicals in wood known collectively as extractives.1 Wood is converted by the tree from sapwood to heartwood by the deposition of extractives, typically many years after the growth ring undergoing this change was formed by the tree. Extractives are thus not a part of the wood substance, nor do they play a major role in the mechanical strength of wood, but rather are additional materials added as a part of the natural aging process of the tree. Most commercial species that are valued for their appearance owe their merchantability, at Ieast in part, to characteristics imparted bytheir extractives.

Keywords: Wood quality; wood chemistry; heartwood; deterioration; sapwood; wood moisture; moisture; solubility; finishes; finishing; wood finishing; wood extractives; knots; decay; durability; decomposition; bleed; discoloration; moisture content; pitch; failure

Publication Review Process: Formally Refereed

File size: 395 kb(s)

Date posted: 01/23/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 36103
Current FPL Scientist associated with this product
Wiedenhoeft, Alex C.
Research Botanist

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