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The term creosote has a broad range of definitions depending on the origin of the coal tar oil and end-use of the material. With respect to wood preservatives, the United States Environmental Protection Agency (EPA) considers the term creosote to mean a pesticide for use as a wood preservative meeting the American Wood Protection Association (AWPA) Standards P1/P13 and P2. [6]
Tung oil has been used for hundreds of years in China, where it was used as a preservative for wood ships. The oil penetrates the wood, and then hardens to form an impermeable hydrophobic layer up to 5 mm into the wood. As a preservative it is effective for exterior work above and below ground, but the thin layer makes it less useful in practice.
After Henry died in 1928, his company and its competitor, J. M. Colman's creosote company (located in West Seattle), were combined in 1930 to form the West Coast Wood Preserving Company. In 1947, Walter Wyckoff bought out the Colman family's interest and, after joining with J. H. Baxter in 1959, renamed the company the Baxter-Wyckoff Company.
The type of wood and the availability of vessel pores largely affect how conservators treat and preserve waterlogged wood. [4] Waterlogged wood objects can be found in a range of excavations sites. For example, waterlogged wood is something an archaeologist might stumble upon during an excavation either from the wood being submerged or near ...
If a wooden object has been damaged by insects or fungi, one treatment method is to consolidate the damaged fibers using a liquid resin or solvent to strengthen the material. This method can lead to visual changes in the object and is not always reversible. [11] Consolidation can also refer to the treatment of painted wood surfaces.
It is extracted from the dry distillation of wood. The residue remaining in the autoclave vessel is a dark, syrupy mass called creosote, which is composed mainly of phenolic acid and cresylic acid. The original composition of creolin is a creosote tar oil, caustic soda, soaps, and very little water. It is of low technology and a very powerful ...
Guaiacol is usually derived from guaiacum or wood creosote. It is produced by a variety of plants. [4] It is also found in essential oils from celery seeds, tobacco leaves, orange leaves, and lemon peels. [5] The pure substance is colorless, but samples become yellow upon exposure to air and light.
Creosote derived from coal processing, was discovered in the mid-18th century to prevent timber pile decay. [3] The development of Creosote pressure treatment by John Bethel was also an important advancement in timber piling construction. [3] Historic buildings supported by timber piles may either be treated with creosote or chromated copper ...