Ching Twu Metal Development Co., LTD was established in Gangshan in 1992 and has been moved to Yongan Industrial Park in 2001. The number of employees has been increased from 20 to 55 so far because of our increasing productivity. The versatile work team in our company is full of experience at metal surface treatment and is able to design the most suitable production for the customers. ＊ Progressively Promoting Towards Business Continuity ＊ ◎ ISO9001:2000 certificated in 2003 ◎ TS16949 certificated in 2008 ◎ Keep promoting our ability and certificated by ISO14001 in 2008 We have developed the organic solvent which is able to transfer the surface. The benefit of the kind of solvent is to avoid being blocked, the remaining of powder and the electrifying problem. Beside, the heat-resistance is its advantage. The longer it is kept, the better effect of salt spray test. Please feel free to provide the sample to be tested and give opinions. ◎ Furthermore, customers can also provide the high-salt-spray trivalent and 6-trivalent sample to be tested. We are pleased to provide our perfect service for you and create the opportunity of “Double-Win”. Main Business Although the main business item is for the normal acid zinc-plated metal, we are devoted to develop Trivalent Chromate-Black, Trivalent Chromate-Green Dye, Trivalent Chromate-Blue Dye, Trivalent Chromate-Red Dye, Blackish Green and etc. to keep promoting our level and make our good power of competition.