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Re: “Dragon’s Blood” res in reduces undercut?

2009-06-28 by Charles

--- In Homebrew_PCBs@yahoogroups.com, Daniel Johnson <a3v03v0@...> wrote:
>
> I switched from ferric chloride to sodium persulphate (MG Chemicals).  It is a much easier to handle are requires somewhat less care.  
> 

You should really try copper chloride.
http://members.optusnet.com.au/eseychell/PCB/etching_CuCl/index.html
Im currently making some. An extra upside is that you can use the HCL (muriatic acid) + hydrogen peroxide to etch as part of creating the copper chloride. The stuff is MUCH less scary than fcl, you can actually see your board , its environmentally friendly and it recycles itself. 7 bucks for muriatic acid and a couple bucks for hydrogen peroxide and youre set pretty much forever

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