I've used 12% peroxide. Be very careful using it and do it in a well ventilated area, preferably outside. The reaction is very exothermic and etching 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% hydrogen peroxide to acid do you use? How long does a typical etch of one ounce copper take? And how often do you have to ârejuvenateâ 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 "Cold Process?"
At Sally Beauty they call their strongest hydrogen peroxide "Salon Care 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 on the 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 "Cold Process?"
Boman33:
I just walked in from my shop where I just completed another perfect cold 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, which is thicker and much glossier
than the above, but much more expensive. This stuff works quite well with "Hot Transfer"
technique.
Regards,
Roland F. Harriston, P.D.
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