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"Cleaning fingerprints off electroplated tin and zinc finishes"


Q. Our company subcontracts the manufacturing and assembly integration of our product. Our product has both tin "Bright Tin Plate per ASTM B545 [affil. link to spec at Techstreet] , Class B (.0002" min.) on a steel sheet substrate conforming to ASTM A1008-01." and zinc "Bright Zinc plate per ASTM B633 [affil. link to spec at Techstreet] TYPE III (CLEAR) SC 2.".

During the assembly process the plating gets fingerprints on it. What should we use to clean the tin that won't discolor it or expose it to oxidation? What should we use to clean the zinc that won't discolor it or expose it to oxidation?

Jon Perdue
- San Jose, California, USA


A. Instead of trying to create another process step and more chemical waste, why don't you have your employee's handle the materials wearing gloves? Seems to me that if you prevent the fingerprints from happening in the first place, you would be better off. Just make sure they take them off when they are eating those Cheetos at lunch. Damn things carry cheese powder like all get out.

tom baker
Tom Baker
wastewater treatment specialist - Warminster, Pennsylvania

October 25, 2021

A. Use trichloride ethylene solution mixed it with DM water 200 ml /litre then dip the piece for 2 minutes after wipe off the piece with cloth cleanly fingerprint will disappear.

a. Vasanth karunakaran
Employee - Chennai, India

October 25, 2021

A. Sorry, don't mix with dm water use it as full strength solution.

a. Vasanth karunakaran
Employee - Chennai, India

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