Homebrew PCBs

I'm using 50 ml muriatic acid mixed with 100 ml hydrogen peroxide......
both are 30% and 70% water. Standard hardware store $4 pool acid and 
drug store $3 peroxide.
  Nothing exotic about this stuff.

On 11/13/2016 10:00 PM, 'Craig Martin' jennyandcraig01@... 
[Homebrew_PCBs] wrote:
>
> \ufeff
>
> The staedtler lumocolor permanent pen 313 permanent (RED)  0.4 line 
> works for me
> The black didn't work in ferric chloride
> Regards
> Craig VK2ZCM
>
>     ----- Original Message -----
>     *From:* Rob roomberg@... [Homebrew_PCBs]
>     <mailto:roomberg@...%20[Homebrew_PCBs]>
>     *To:* Homebrew_PCBs@yahoogroups.com
>     <mailto:Homebrew_PCBs@yahoogroups.com>
>     *Sent:* Sunday, November 13, 2016 8:27 PM
>     *Subject:* Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH
>     TEST finer lines
>
>     THANK YOU for the suggestion.
>
>     I'll have them here in a few days.
>     http://www.ebay.com/itm/262038010827
>
>
>
>     On 11/13/2016 03:48 AM, 'Dave Wade' dave.g4ugm@...
>     [Homebrew_PCBs] wrote:
>>
>>     I believe that some of the Staedtler waterproof markers were
>>     reasonably etch resistant, may not be this exact one..
>>
>>     https://www.staedtler.co.uk/en/products/markers-refill-ink/universal-pens/lumocolor-permanent-pen-313-permanent-universal-pen-s/
>>
>>     some folks sell these as etch resist on E-Bay..
>>
>>     http://www.ebay.co.uk/itm/121477899315
>>
>>     but they are available with fine tips.
>>
>>     Dave
>>
>>     These are what folks used to recommend
>>     > -----Original Message-----
>>     > From: Homebrew_PCBs@yahoogroups.com
>>     > [mailto:Homebrew_PCBs@yahoogroups.com]
>>     > Sent: 13 November 2016 00:49
>>     > To: Homebrew_PCBs@yahoogroups.com
>>     > Subject: Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH
>>     > TEST finer lines
>>     >
>>     > On 11/12/2016 9:43 AM, Rob roomberg@... [Homebrew_PCBs] wrote:
>>     > >
>>     > >
>>     > > I was hoping to find a marker that could leave a finer line.
>>     > > I am getting a real fat line with a sharpie.
>>     > > So I was hoping a new sharpie might leave enough inck for a
>>     thinner line.
>>     > > This is too fat for DIP pins:
>>     > > http://www.learnmorsecode.com/laminator/pic/PIC16F628PROTO8d.jpg
>>     > > It works but is tight.
>>     > > http://www.learnmorsecode.com/laminator/hotcakes.html
>>     >
>>     > Hello--
>>     >
>>     > At the risk of revealing the era in which I learned technical
>>     drawing (*), how
>>     > about using an erasing shield?
>>     >
>>     > http://drawsketch.about.com/od/materials/ss/erasershield.htm
>>     >
>>     > The online auction site lists a bunch of sources for $.99 on up...
>>     >
>>     > 252478256009
>>     >
>>     > (Usual disclaimers apply.) Also, I haven't tried this due to
>>     displacement of my
>>     > drafting kit<g>.
>>     >
>>     > In theory, the marker ink shouldn't spread under the shield and
>>     smear, but if
>>     > so, applying some tape on the under side to raise the shield
>>     off the
>>     > copperclad might work.
>>     >
>>     > 73--
>>     >
>>     > Brad AA1IP
>>     >
>>     > (*) I worked on the crew that invented Fire....<g>
>>     >
>>     >
>>     >
>>     >
>>     > ------------------------------------
>>     > Posted by: Brad Thompson <brad.thompson@...>
>>     > ------------------------------------
>>     >
>>     > Be sure to visit the group home and check for new Links, Files,
>>     and Photos:
>>     > http://groups.yahoo.com/group/Homebrew_PCBs
>>     > ------------------------------------
>>     >
>>     > Yahoo Groups Links
>>     >
>>     >
>>     >
>>
>
>
>
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