On Wed, 22 Feb 2012 15:30:39 -0500 gene heskett <ghesk...@wdtv.com> wrote:
> Greetings all; > > The new encoder wheel I made last night, by fiddling with the math > that determines the slot width until it has virtually no side wobble > of the 1/16" mill at the inner apex of the slot, makes me ask a > question about what is the best way to chemically blacken brass, > hopefully with the intention of preventing reflections from the sides > of the cut in the brass that might artificially broaden the effective > aperture of the slot. > > So, how does one chemically blacken brass? Some one on the web suggested Copper Carbonate and household ammonia. I think I'd go with a sulfide. (enjoy the smell but do it outside ). BNG (big nasty grin). The web should have some good suggestions; artists blacken brass all the time. Dave > > Ideally something that destroys any and all surface gloss, leaving a > dead flat microscopic felt like finish. > > I considered paint, but at those angles of reflectance, even black > paint might as well be glossy white. Plus I don't have any other > than some ebony wood stain. ;-) > > Cheers, Gene ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
