Homebrew PCBs

I could not get consistent results with a clothes iron so I resorted to 
steel plates:

http://www.learnmorsecode.com/laminator/hotcakes.html


On 07/07/2017 12:32 AM, 'Brad' unclefalter@... [Homebrew_PCBs] wrote:
>
> Thanks guys.  Going to take another run at it.
>
> Question for those that iron \u2013 I have read competing schools of 
> thought.. some say you need tons of pressure, others say you just need 
> consistent heat.  Thoughts?
>
> *From:*Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com]
> *Sent:* Thursday, July 6, 2017 8:09 PM
> *To:* Homebrew_PCBs@yahoogroups.com
> *Subject:* Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
>
> Brad,
>
> A couple of thoughts:
>
> I have used Bar Keeper's Friend on some stubbornly oxidized boards. It 
> contains some oxalic acid, so wear gloves.
>
> When a board is completely clean, it will support a continuous film of 
> water. If you hold the board horizontal, and pour enough water on it 
> to cover it, the water spreads out, and will pull away from any place 
> that is not clean.  Pat the board dry with clean paper towels.
>
> Harvey A
>
> On 7/6/2017 12:41 PM, allan.hale@... <mailto:allan.hale@...> 
> [Homebrew_PCBs] wrote:
>
>     Hi Brad,
>
>     On the severely oxidized portion of the boards you can try two
>     items,  Straight, clear ammonia  NH4OH or sudsy ammonia with
>     several applications it should clean off the old board but may
>     take several applications tro achieve your desired results.
>
>     One other item to try is "Tarn-X" available at Walgreens and CVS
>     stores.  This product is a thio-urea based cleaner and works
>     wonders on PC boards based on personal experience. I'd avoid the
>     sandpaper or emery cloth abrasive materials in favor of the liquid
>     cleaner products.
>
>     When you get the copper mostly clean you could use "Brasso" to
>     bring up a shine on the board, then wash with Dawn dishwashing
>     detergent to remove any remaining oils followed by a clean water
>     rinse and dryoff, before you proceed to the toner transfer
>     process.  This practice should get your board almost surgically
>     clean which is what you need for a really successful transfer process.
>
>     Best of luck in your endeavors!
>
>     Allan,   WA9IRS
>
> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>
> 	
>
> Virus-free. www.avg.com 
> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
>
>
>