Chemicals: wood surface cause a color change chemical agents mainly are: ① a transition metal (such as iron ions, etc.) and an oxidizing agent (e.g. KmnO4 etc.); ② acid, base or other chemical additives during processing. Discoloration of the chemical composition: wood color change produced the main chemical components are: tannins, flavonoids and phenolic compounds and lignin. (2) Chemicals discoloration mechanism. Tannic nature: one with strong polarity, soluble in water, ethanol, acetone and ethyl acetate; the second is with heavy metal salts (such as lead acetate, copper) and alkaline earth metal hydroxides [such as Ca (OH). ] Solution to form a precipitate; the third is the formation of transition metal complexes with color, such as reaction Xianyang wooden showcase with FeCl3, born black or green precipitate; fourth is a strong reducing agent shenmu wooden showcase, easily oxidized in air, especially the role of the enzyme Under the form color compounds. Xianyang 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!