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topic 5162

Masking for Anodizing


I am looking for an anodizing masking method to prevent an area of a part from anodizing.

Tony Prosser
- Tucson, Arizona


The most common methods are tape, liquid masking (paint like) and solid masking methods like plugs.

James Watts
- Navarre, Florida


Hi Tony,

Since this guy is roaming around here and he keeps tabs on my posts *GRIN*. Call Mark at U.S. Specialty Color down in North Carolina I do believe, They sell a liquid maskant that can be purchased in 1 gallon and 5 gallon containers, I've got a 1 gallon myself and it will probably last me a very long time, and its relatively inexpensive, around 35-40 for a 1 gal. container. If you're looking for something more along the lines of caps, plugs or tapered masks, well take your pick. There's no less than 10-12 that I can think of. Names like Shercon, Mocap, Tapecase. There's a bunch more out there too.

Matthew Stiltner
- Toledo, Ohio


The best way depending on the flatness of the area is US Speciality. I use about 1 gallon per week for flat surf. and it works faster and cleaner than tapes, but if you want to use tape C.S. Hyde have a green poly tape inexpensive and can be dye cut to the right size with a release liner, we're talking pennies here for over 5K. Liquid mask is best put on by silk screen ( you can get a cheap one from a PCB supplier if they have some around and screens are also low cost.

steve bradley
- Ottawa Ontario Canada

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