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 layer blackening agent,Silver dye black liquor,Electroplated silver hair black agent

Silver layer blackening agent,Silver dye black liquor,Electroplated silver hair black agent

First, the product code: Q / YS.807 (Yi Shun brand)

Second, product index:

1, PH> 7.0

2, the proportion of> 1.0

3, color: brown transparent green products non-toxic products.

Third, the use of methods:

This product stock solution used, heated to 60-70 ℃ after soaking the silver workpiece in the antique black agent for about 2-5 minutes, remove the workpiece washed.

Fourth, note:

This product can also be used for imitate antique black copper parts.

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