Homebrew PCBs

Thanks for the heads-up. My etching will be done in an open-doored garage. At -18F, a little exothermic etchant might be just what the doctor ordered!  :)
Know what else is exothermic?
300,000 gallons of five-year-old liquid hog manure in three giant under-barn pits...  Guess I won't be making an offer on that farmstead!
73 for now,
--Kirk, NT0Z
 My book, "Stealth Amateur Radio," is now available from www.stealthamateur.com and on the Amazon Kindle (soon) 

    On Wednesday, January 20, 2016 6:49 AM, "Mark Lerman mlerman@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:
 
 

     
I've used 12% peroxide. Be very careful using it and do it in a wellventilated area, preferably outside. The reaction is very exothermic andetching can be complete in < 1 minute. I finally went back to the 3%,often using a sponge to hasten and make the etch more even.

Mark

At 06:13 PM 1/19/2016, you wrote:



What ratio of the 12% hydrogenperoxide to acid do you use?  How long does a typical etch of oneounce copper take?  And how often do you have to “rejuvenateâ€it?
Thanks,
Mike K5ESS
 
From: Homebrew_PCBs@yahoogroups.com[mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Tuesday, January 19, 2016 4:00 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] My materials for "ColdProcess?"
 
  
At Sally Beauty they call their strongest hydrogen peroxide "SalonCare Maximum Lift 40 Volume Clear Developer."
 
FYI, "40 volume" = a 12% hydrogen peroxide solution.
 
It seems to be on sale now for $1.50 a quart = good deal :)
 
--Kirk, NT0Z
 
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and onthe Amazon Kindle (soon)
 
On Tuesday, January 19, 2016 3:46 PM, "'John Snyder'Kochcal@...[Homebrew_PCBs]"<Homebrew_PCBs@yahoogroups.com> wrote:
   
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      - Roland   

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      - Thanks for the specific information.    

      - Can you also tell us the printer and if it has oem toner or not   

      - And an idea of the line width  and spacing size?   

      -     

      - John    

      -     

      - From:Homebrew_PCBs@yahoogroups.com[mailto:Homebrew_PCBs@yahoogroups.com]    

      - Sent: Monday, January 18, 2016 2:37 PM   

      - To: Homebrew PCBs   

      - Subject: Re: [Homebrew_PCBs] My materials for "ColdProcess?"   

      -     
   
   

      - Boman33:   

      -     

      - I just walked in from my shop where I just completed another perfectcold toner transfer using   

      - a 2 to 1 ratio of "Top Care iso alcohol 70% to"Equate" nail polish remover, 100% acetone,   

      - from my local Walgreen's emporium.   

      -     

      - The PC laser image is on  Office One "Business Gloss"32lb. 92 brilliance (indication of glossy surface) paper.   

      - This paper is  made by HammerMill Paper Co.   

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      - Next, I will try Office Max "High Gloss" photo paper, whichis thicker and much glossier   

      - than the above, but much more expensive.  This stuff works quitewell with "Hot Transfer"   

      - technique.   

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      - Regards,   

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      - Roland F. Harriston, P.D.   

      - ****************************   

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