plating, anodizing, & finishing Q&As since 1989
Wax Stop-offs for Plating on Aluminum Parts
Q. WHAT KIND OF WAX CAN I USE AS A STOP OFF COMPOUND FOR ALUMINIUM AND BRASS COMPONENTS BEFORE SILVER PLATING? DOES THE WAX HAVE TO BE MIXED OR DISSOLVED WITH SOMETHING? THANK YOU.DHIMAN SHAH
- MUMBAI, INDIA
A. It can be melted and after the plating can be steamed off. If plating bath is hot you have to use a high temperature melting wax.SAM OBERMEISTER
- Brooklyn, New York
May 10, 2010
The wax required is usually a blend of hydrocarbon waxes, mainly consisting of microcrystalline wax. There are many different grades of microcrystalline wax, each with their individual characteristics. In order to select the correct wax specs, you need to work out which wax has the correct amount of flexibility and melting point.
Incorrect wax selection will result in cracking or lifting-off of the wax.
- Kent, UK
Wax Stop-off is Staining Anodized PartsFebruary 3, 2016
Q. Problems after removing wax masking in hot water: parts are staining on the anodising.andrew thomas
July 25, 2016
I've seen this a few times, and there are a couple of possible causes.
1) impurities in the water
2) impurities in the wax
I suggest you try replacing your water with pure, softened water. If this doesn't work try using a different, higher quality wax.
Which brand of wax are you using?
- Kent, UK
Ed. note: Thanks for your continued help Tom! We don't suggest or discuss brands or specific proprietaries on this site though for a number of reasons. We've tried doing it under various arrangements, off and on for 21+ years in this forum, but it usually ends in ever-spammier boilerplate replies, hostility, phony plants from 'satisfied customers', disproportionately favorable comments because unhappy customers are afraid of hearing from lawyers, as well as complaints from our advertisers that they are happy to sponsor camaraderie and technical discussions, but not to pay for testimonials and contact info for their competitors who don't want to share in the cost of the site :-)
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