On 06/03/2012 11:39 AM, gene heskett wrote: <snippage> > As for the various methods of blackening brass, discussed here previously, > most were butt ugly, giving all the colors of a good skin bruise rather > than a nice flat black. I believe that was because of my inability to get > all the cutting oil washed back out of the brass with clean acetone or > boiling in dish soap. I can't go enough narrower to fix it with a 1/32" > mill as I can't trim the slot width more than another thou, so today I will > try dimming the leds. There has to be a fix someplace, I just have to find > it... >
> Cheers, Gene > Gene, Acetone is a lousy degreaser. Scrub with Dawn dish detergent and hot water, the follow that with a rubdown of denatured alcohol and a clean, oil free rag. Coffee filters or paper towels work good for that. That's all I do when I turn nickel silver fly rod ferrules, and I use cutting oil when turning them. I black/blue them without any trouble after that type of cleaning. Make sure you don't touch the brass with your bare hands after cleaning/degreasing, because skin oils will cause problems too. Mark ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
