Three species are generally greater capacity timber wooden showcase, the lower the rate of corrosion. Also Shangluo wooden showcase, oxygen, metal ions (especially iron), fuel, also can promote the formation of free radicals. 2. Chemicals discoloration caused by (1) the characteristics of chemical agents cause discoloration. Chemicals cause the wood surface color change is an important change in the color of a timber class. Features: ① fast response, discolored wood in a short time; ② mostly appearing in the process, or after the end of the processing; ③ affect the reaction premise Yulin wooden showcase, such as temperature, time, and so on by PH; ④ reactions occurred in heartwood. Material is an important factor leading to extract wood discoloration. Currently Weinan wooden showcase, wooden showcase research on causes of discoloration, although more, but for a single color compound structure, mechanism and study all the trees change color discoloration impact is also less. ① tannins. Tannins by hydrolysis and condensation type tannin tannin components. Hydrolysable tannins usually gallic acid and its dimer (two gallic acid or acid continued to spend) and monosaccharide esters formed. Such tannic acid and enzymatic hydrolysis can be. Condensed tannins are catechins (flavan-3-ol) condensate derivatives such tannic acid and enzymatic hydrolysis difficult to be generated when the polymer is heated in dilute acid Pink amorphous substance. Tongchuan wooden showcase, wooden showcase, Shaanxi Boha Showcase by Shaanxi Boha Showcase Productions Ltd. Shaanxi Boha Showcase Productions Ltd (www.xabhzg.com/) strong, credible, in Xi'an equipment exhibition industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shaanxi Boha Showcase and you hand into the brilliant, for a better future!