The process of boiling or steaming develops the strength and elasticity of the wood but is economical of the enormous cost. Natural Seasoning; Artificial Seasoning; Lets discuss both methods one by one. It is the process in which logs of timber are boiled in water in temperature at which is placed up to a boiling point and is maintained for several hours after which it is dried naturally. The different methods of seasoning are: (a) Boiling (b) Kiln seasoning (c) Chemical seasoning (d) Electrical seasoning. Seasoning can be completed in 4 to 5 days only. 1. Seasoning of Timber Revised by A. LAMOND and J. HARTLEY "Free" and "Bound" moisture Expressed as a formula: Fibre saturation point As the free moisture leaves the cell cavity, it will eventually become empty, leaving the cell wall still saturated. Advantages and Disadvantages of Air Seasoning of Timber compared to Kiln Drying (Continued from Timber Kiln Drying Equipment) • Kilns can dry to lower moisture contents than can air seasoning – in fact we must use kilns in countries having cool, moist weather conditions (such as U.K.) for most indoor applications. Seasoning of Timber. 34/1 [51] Int. Manufacturing of Artificial Stone. Natural Drying/Air Drying Air-drying is the drying of timber by exposing it to the air. Book Material. The wood with desired moisture content may be obtained by the artificial seasoning. By. Artificial Seasoning. Natural Seasoning. Artificial Seasoning To make the drying more uniform and even, by controlled conditions artificial seasoning is adopted. Why we need Seasoning Of Timber. So the chances of fungi and insect attacks are less. The major aspect of his research work was focused on moisture content in timber resulting from poor and improper seasoning where he revealed how various artificial seasoning methods do account for the main causes of defects in timber and how they can be prevented. Seasoning of timber can be carried out either naturally or artificially. To resist the attack of insects, fungi. Water Seasoning . • Seasoning of timber should be protected from rain and humidity. 2) Kiln Seasoning Advantages: Insects are killed during this process, Require little stacking space, Moisture content of the timber may be brought to any desired level It is difficult to boil for large quantities of wood, so hot steam is sometimes passed through wooden logs in enclosed rooms. Natural Seasoning : Timber pieces can either be stacked horizontally or vertically and the seasoning is carved out by natural air. Natural Seasoning ; Artificial Seasoning; 1. It requires about 60 to 90 days for softwood. The purpose of seasoning is to reduce the moisture content in the wood to a level appropriate to the use of the articles made from the wood. The process of dying timber or removing moisture or sap, present in a freshly felled tree, is called seasoning of Timber. Cl. After artificial seasoning the wood becomes harder, whereas in natural seasoning the wood becomes soft. The Seasoning of Timber "Seasoning" is the name given to the methods of drying timber. Artificial seasoning. Kiln Seasoning or Conditioning (aka Artificial Seasoning) is the method now most commonly used, especially for Softwood, because it is quicker and more economic. 2. Time required for natural seasoning of timber is around 120 to 180 days. The procedure of manufacturing artificial stone is as follows: a. The equilibrium moisture content of artificial seasoning (kiln) can be controlled manually or automatically. 15. The seasoning of timber using natural elements like water, the air is known as NATURAL SEASONING The natural seasoning could even be water seasoning or air seasoning. In natural seasoning, timber … No. United States Patent 1191 Pless ARTIFICIAL SEASONING OF TIMBER [76] Inventor: John Henry Pless, 48 Kinnerton St., London, S.W.l, England [22] Filed: Sept. 8, 1969 [21] Appl. The kiln avoids the heat transmission loss as it discontinues the flow of steam and heated oil. This is such an important stage in the drying that it is given a special name, and the term is "fibre saturation point". Artificial Seasoning: In this technique timber is seasoned in a chamber with, controlled humidity, regulated heat and correct air circulation. Seasoning can only be completed in 4 to 5 days. Seasoning may be completed in 4 to 5 days only. A manual of the timbers of the world; their characteristics and uses, to which is appended an account by S. Fitzgerald of the artificial seasoning of timber. So much so that repeated inquiries for … Seasoning is necessary because it reduces the risk of decay or attack by fungi on green or unseasoned timber. Newly felled tree contains a considerable quantity of sap. Moisture content can be reduced as per requirements. Kiln-seasoning thus began to assume an important position, where timber was in question, in commercial centres. The popular method of artificial seasoning is kiln seasoning. Artificial Seasoning: In this method, the wood is kept in a chamber with regulated heat, Controlled humidity and proper air circulation. (ii) Artificial Seasoning: In this method timber is seasoned in a chamber with regulated heat, controlled humidity and proper air circulation. To minimise the cost of handling, transport by decreasing the weight of wood. Artificial seasoning is controlled by application of both heat and humidity which enables to reduce the moisture content quickly and accurately. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method.. Seasoning isn’t always uniform in all the section of timber. To give strength, hardness and to make electrically resistant. MC Neills Seasoning. A manual of the timbers of the world; their characteristics and uses, to which is appended an account by S. Fitzgerald of the artificial seasoning of timber by Howard, Alexander Liddon, 1863-1946 It may even decay. Artificial stone can be moulded into most intricate forms easily and so it is most economical when it is substituted for the carvings and ornamentations in natural stone. Published material. Timber seasoning types. There are two method of Seasoning as classified below. Also read: What Is Formwork Failure | Causes of Formwork Failure. SEASONING OF TIMBER. Moisture content of wood can be brought down to about 10 – 20% by natural seasoning. LondonMacmillan1920 Subjects In this method of artificial seasoning, the timber is immersed in water and water is then boiled. In this method wood is dried usually by the keeping the wood exposed to air, so that the moisture evaporates and wood is seasoned. Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. Shrinkage, cracking and warping are minimized in artificial seasoning. It is then dried very slowly under a shed. Artificial Seasoning of timber are: A. Kiln Seasoning. There are different methods of artificial seasoning. For practical use, it is formed into a mortar or is used as concrete. Seasoning is done for the following reasons: When wood utilised as fuel, to make it burn quickly seasoning is done. The timber is thus boiled with water for about three to four hours. Seasoning increase the strength of timber; To make concrete durable; To increase dimensional stability ; Seasoning reduces the weight of timber; Seasoning Methods. A newly fell tree contains water up to 50% of its dry weight. Vertical spacing achieved by using timber battens (25mm) of the same species. Moisture content in wood can be reduced to the desired level due to the artificial seasoning. : 855,880 [30] Foreign Application Priority Data 9 Sept. 6, l968 Great Britain 42,609/68 [52] US. Howard, Alexander Liddon, 1863-1946 Type. In Water Seasoning method, timer kept immersed in ponds or … Seasoning of timber means removal of moisture content from timber. The moisture content of timber should be kept between 10 to 12 % of its dry weight. This method of seasoning and moisture content may be obtained by the artificial:! Stone is as follows: a obtained by the artificial seasoning, the wood with desired moisture from. 4 to 5 days only whereas in natural seasoning of timber used as.. 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