Homebrew PCBs

On Fri, 27 May 2016 18:32:09 -0700, you wrote:

>Yeah I remember muriatic acid \ufffd used to use it to clean our pool.  That was seriously nasty stuff \ufffd I\ufffdm a bit uneasy about bringing it back into my life.  That\ufffds why I was thinking etchant.  I can\ufffdt remember \ufffd you *can* pour it into a standard plastic tub right?

Yes, and it's generally mixed one part HCL with 4 parts of drugstore
peroxide.  Pour the acid into the peroxide.  Works wonders, watch
because it can be quick.  Then you need to heat it and bubble air into
it once the peroxide goes.

FeCL3 is nastier, it's almost the same stuff and stains
enthusiastically.


Harvey


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>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
>Sent: Friday, May 27, 2016 4:33 PM
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] Re: Amount of etchant needed
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>There is no need to order echant.   Go to the hardware store and buy a bottle of muriatic acid, peroxide at the grocery.   2 parts hydrogen peroxide and 1 part muriatic acid. Always add the acid to the peroxide to prevent splashing.   Wear gloves and eye protection.    Use is a well ventilated area.
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>The mixture is clear so it is easy to see when the etching is done.  Mix enough to cover the board.   Toss it when your are done as it is very cheap.  Don't poor down the drain.   Makes a great cleaner for sidewalk stains.   Cut with some water.
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