Note that the above micro-etching solution can only be maintained up to twelve hours, grinding machines, cotton swabs should be replaced after grazed, so a small amount of copper contamination microscopic crystalline copper surface. Readers need to do more to explore, find out the trick before. Early used "add a small amount of sulfuric acid and chromic acid salt" micro etching method has been left behind, but also to make tin-lead layer is black, should not be reused. Ammonia method by crystalline copper surface is more delicate, grinder wheel, tin-lead surface still showing white, the black portions of which common tin-lead volume is more regional. Careful study of the right to be able to judge the sake slice must be carefully polished and carefully microetched, otherwise it is only in vain. General shipments of large amounts of chips, the average up to seven or eight truth can be seen only. The above information is shared by the Friends of the Shenzhen-Hong Lean Automation Co., Ltd.! Shenzhen-Hong Friends of Lean Automation Co., Ltd. was established in 1996, with more than ten years of experience in the production diamond grinding tools rapid rise in selling quality wheel cutting, cutting, grinding market while the Taiwanese technology integration and development as PCB automation equipment, within more than a dozen units has been applied, but also exported to Australia twice, it has been widely praised at home and abroad users. This technology is limited to individual parts of the processing, the application was not enough common, but also further improve the process and optimize the grinding process parameters, to expand the scope of grinding; also improve the grinding machine, grinding machine slide, increase grinding machine performance, improved mill shapes, to reach practical, the degree of commercialization, for wider application. Grinder, Acer Friends lean automation, grinders buffer provided by the Friends of the Shenzhen-Hong Lean Automation Limited. Grinder, Acer Friends lean automation, grinders buffer is Lean Automation Co., Ltd. Shenzhen-Hong Friends (www.winsole.cn) (www.hy978.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page or on the telephone picture to obtain the latest information, contact: Li Baoqin.