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Since ancient times people used the natural plant and animal pigments for dyes to dye for clothing. Indigo, gall and carmine in ancient China the first application such as plant and animal dyes. Modern organic dye only 100 years of industrial history. Since the mid-19th century, British and other Western industrial countries, weaving industry, needs a lot of dye, and Metallurgy Industrial organic dyes provide the conditions for research and production. 1857, the United Kingdom with coal tar Peter Chin won in the organic synthesis of dyes Benzene and aniline acetate achieved industrial production, followed by a variety of dyes one after another. The past 20 years, with the rapid development of synthetic organic dyes are very widely used.

  So-called organic dyes is the ability to dissolve in water or Solvent In appropriate ways in which fiber material or other material dyed bright and color fastness of organic compounds. In addition to Textile Extensive use of the industry, the organic dye is widely used Rubber Products, plastics, oil, Ink , Ink, photographic materials, Print , Paper, Paint , Medicine And so on. Organic dyes Timber Processing in the field originated in 1913, the use of aniline dye ester has been used for solid wood. Since the 60s, Japan has done a lot of wood stain in the field of research. Germany and Italy attached great importance to wood stain practical development of industrial technology to create its own proprietary technology, its products in China has Sell . 80 by the end of the beginning of the wood staining techniques to explore. As the dye is to increase the decorative effect of wood, an important means to enhance the added value of wood, wood stain research areas are being produced widespread concern and attention.

1. Wood staining dye Wood and wood stain is a chemical dye or a combination of physical chemistry, so that the color fastness of wood has a certain process is to improve the quality of the wood surface to improve the visual characteristics of wood and wood attached to improve an important means of planting. Variety of dyes, complex structure, the timber industry in the common water-soluble organic dyes direct dyes, acid dyes, basic dyes and reactive dyes and so on. Dyes are not specially treated wood can be directly on the dye, it is relying on a combination of wood cellulose molecules of the van der Waals force and hydrogen bonding. Acid dyes, also known as anionic dyes, in acidic medium for effective dyeing of fiber dyes, such dyes containing a large number of carboxyl, hydroxyl or sulfo. Basic dyes, also known as cationic dyes, methane and benzene type, azo type, type and other xanthene formation of organic base and acid salt. Reactive molecules containing reactive activity of genes, with the timber in the formation of covalent bond hydroxyl compounds.

1964 Okawa Yong, etc. with direct dyes, acid dyes, basic dyes on the wood stain. Kenichi Matsuda 1978, after bleaching of wood dyed with disperse dyes and so on. Yoko Kitamura, 1971 and other studies with various dyes dyeing wood, results showed that acid dyes with good permeability, suitable for wood staining. 1990, Tian-sheng Sui festive dinner on the 58 species of hardwood such as and 3 stained softwood test, using 21 kinds of direct dyes, acid dyes, basic dyes and reactive dyes. Liu Yuan in 1993, an article describes and characteristics of wood stain.

2. Staining A variety of wood stain, as dyeing materials uses. Commonly used with dyeing, wood staining and staining methods of stumpage. Veneer dyeing and dyes for different species vary greatly. Veneer stain is to use soaking the veneer and the veneer uniform staining method, veneer thickness 0.2-1mm. Dyed veneer for plywood veneer wood, wood furniture, veneer and simulated wood group of man-made blanks. Yoko Omura 1975 based study dyeing wood veneer and found that the higher the temperature, the shorter dyeing time, 90 ° C2h impregnation thickness, in 50 ° C when more than 24h. 1989, Yang Chen Yunying, etc. Canada, basswood and willow eucalyptus veneer staining methods were explored. Of dye uptake by timber and Color The observation and analysis, with Acid Red GR dye bleaching Paulownia veneer 0.5mm thick were stained test. Solid wood or wood stain is carried out in other dyeing processing, dyeing material mainly used for slicing veneer, or Make High-grade furniture. As the thick, long timber, under normal conditions by the stain of their uniform and thorough penetration is difficult to stain wood, Guer 1992 Tim wild abundance in high-temperature, high pressure, vacuum and other complex conditions, tests on stained wood. Standing staining, usually with some new activity logging of timber, the Ministry of immersion dye solution by capillary wood sap flow in the active dye molecules driven upward along the trunk and dyeing, weight and other health field in 1990 festive dinner on the 58 species hardwood and 3 softwood stumpage staining test carried out.

3. Dyeing Dyeing and staining wood use different ways to determine the diversity of wood dyeing. Yong 1964, Okawa and other methods using dye impregnated timber at room temperature. As the largest timber size, timber internal hard uniform staining, so he tested a cook staining. However, the cooking time, make wood Organization Change hair color and dyes are also unhealthy, so this method is only suitable for a particular dye or chemical Drugs Staining. So he began to study differential temperature dyeing method, the method of wood heating for the first, and then dipping into the cold heat stain in the wood, wood heated in air and water expansion and out, into the cold dye, the wood inside negative pressure, so that dye solution to penetrate to the wood than a smooth interior. Akio 1966, cloth and other village uses CedarBbrownA1312N (FBY) dye Hokkaido timber for pressurized timber and into the South Seas staining. Fung 1992 Soeno wood by vacuum pressure method of staining. Dyeing at high temperature, vacuum, high pressure under complicated conditions such as completion of processing of wood thick 32mm, vacuum pressure treatment aims to exclude air and excess moisture in wood. At 30 ° C when the decompression time is softwood 8-10h, hardwood 12h; vacuum pressure 10mmHG. Then when the softwood deal with the pressure 20hg/cm2 6h. When the pressure 30Kg/cm2 hardwood handle 8h.

4. Theory of wood stain

With in-depth study of the dyeing process and dyeing products, higher demand, theory of dyeing is also growing. Introduced in 2000 on the composition of wood stain water-soluble dyes and dyeing, dyeing effect of impact on the larger timber

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