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 ârejuvenateâit?
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:
-
-
- Roland
-
- 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.
-
- 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.
-
- Regards,
-
- Roland F. Harriston, P.D.
- ∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
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