毛片在线观看AV_久久精品国产亚洲αV麻豆网站_在厨房被c到高潮_亚洲国产男人的天堂你懂的_国产极品粉嫩馒头一线天_最近更新中文字幕手机版_午夜视频等优质视频资源_亚州性夜夜射在线观看_高清无码人妻精品内射视频_2021中文字幕无码免费

Silver Chrome-Free passivation Agent,Passivation and color preserving of silver layer,Anti-oxidation of silver layer

Silver Chrome-Free passivation Agent,Passivation and color preserving of silver layer,Anti-oxidation of silver layer

First,  product number ：Q/YS.804(Yi Shun brand)

Second,  range of application：

This product is suitable for passivation treatment of silver jewelry, silver conductive layer, silver surface, do not affect the color of silver, does not affect the conductivity, environment-friendly, non-toxic, can effectively prevent the silver layer discoloration and becoming dark.

Third, product index：

 1 colorless:transparent liquid

 2.no special smell

 3.PH value ：neutral

 4.proportion： 1.0g/cm3

Fourth, usage method

1.working liquid（Q/YS.804）:water（tap water）=1:8 to 10 

2.clean silver dip in silver passivator for 3-5minutes, passivation temperature ：25-60 degrees centigrade.

3.washing the passivated silver layer

4.drying to remove water to save.

Fifth,  matters needing attention：

1.products should be sealed to prevent pollution and volatile .

2.add about 5% Q/YS.804 silver passivation solution.

Other processing：Chemical nickel plating liquid、Chemical silver plating liquid (copper substrate)、Metal polishing Agent、Copper surface treatment agent series、Silver layer blackening agent、Dedicated blackening agent for cast aluminum