On Wednesday, February 22, 2012 04:17:54 PM dave did opine: > 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
I looked at that Dave, but the images seemed to suggest lots of gloss to the final finish, not exactly what I need given the angle of incidence is likely under 20 degrees at the highest. No clue where I could get the copper carbonate either. :( It sounds expensive by the time I pay the hazmat fees. Thanks. > > > 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 Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Consultation, n.: Medical term meaning "to share the wealth." ------------------------------------------------------------------------------ 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
