Summary for matte anodized surface Discussion
Matte anodized surface is the goal in this thread, with the questioner asking how to dull aluminum before anodizing without changing part dimensions and without using caustic pretreatment. The request also specifies that the method should work for both clear and black anodize and for all alloys. In response, Marc Green notes that his shop tumbles cosmetic aluminum parts before plating to create a matte rather than shiny finish. Sean Garry adds the same general approach, saying they tumble cosmetic aluminum parts to achieve the matte look. The thread does not discuss a universal chemical substitute for caustic, but it does point to mechanical tumbling as a practical way to reduce gloss while avoiding dimensional change.
Q. We are looking to make the anodized surface dull or matte without changing the dimensions of the part. We would like an alternative to caustic as the pretreatment. Must work for clear and black anodize and all alloys.
Mr. Tim Neth
– Amherst, New York
2001
 | Hello, You might try bead-blasting or an alternate mechanical surfacing method before anodizing. Bill Grayson Even though its a little labor intensive, try glass bead blasting … just make sure its done very evenly.
Tim, We tumble cosmetic aluminum parts before plating to achieve a matte vs. shiny finish. Sean Garry |
