Stefan Trethan wrote: >>How about a solution composed of NaOH and H2o2? >>You will get: >> >>Cu(OH) Blue in color >>Cu(OH)2 Black in color. >> >>If you apply heat, the Cu(OH) will be oxidized to >>Cu(OH)2. >> >> >> >>Best regards >> >>Marvin Dickens >> >>=== > > > > Thanks, that's worth a try.... > > The black i produced the other day didn't stick.... > Thats interesting. I found this doing a google search http://doc.tms.org/ezMerchant/prodtms.nsf/ProductLookupItemID/JEM-0306-558/$FILE/JEM-0306-558F.pdf I was wrong before, its actually sodium hydroxide and sodium chlorite. Not sure where you get chlorites from. I thought all the chlorite, chlorate and perchlorates are ingredients in bomb making material so may be difficult to get in a useful form. The order of oxidation power (lowest to highest) is NaCl0 sodium hypochlorite NaCl02 sodium chlorite NaCl03 sodium chlorate Na(Cl0) sodium perchlorate
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Re: [Homebrew_PCBs] Blackening Copper
2004-05-14 by Adam Seychell
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