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

Brass dedicated blackening Agent,Blackening Agent at ambient temperature,Copper Blackening Agent

Brass dedicated blackening Agent,Blackening Agent at ambient temperature,Copper Blackening Agent

First, the product code: Q / YS.122 (Yi Shun brand)

Second, the scope of products:

This product is suitable for black and brass H59 and above, as well as optical instruments such as telescopes, film bonding with good.

Third, the product composition:

By the black agent and blackening additives, mixed before use. Press black agent: Blackening additive = 1 kg: 60 grams to 80 grams.

Fourth, the use of instructions:

① According to customer requirements brass pre-treatment: degreasing, matte, rust or polishing, preferably mechanical polishing or sandblasting.

② Press per kilogram of black agent with 60 ~ 80 grams of black additives Stir for 5 minutes, take the upper black overnight blackening treatment. Black best temperature at 35 ℃ ~ 50 ℃.

③ Soak the brass 5-10 minutes, do not stop about gently flip the workpiece soaking process.

④ Use several times after the blackening agent its use will be reduced, should be an appropriate amount of stock solution and blackening additives. Stir at about 40 ℃ after precipitation, the supernatant to use.

Fifth, note:

Products are volatile, sealed sealed to maintain efficacy.

Other processing：Environmental degreer and rust remover、Stainless Steel Polishing Agentas、Brass Green Chemical polishing Agent、Electroless plating of real gold on copper surface、Strong oil stain removal agent、Environmental non-cyanide gold removal liquid、Copper malachite green colorant