Homebrew PCBs

On Mon, 9 Nov 2009 22:06:19 +0100, you wrote:

>I've used it to mask the back side which I didn't want etched.
>

I run the board through a laminator set to cold.  I use "Martha
Stewart (tm) brand shelf lining.  Remarkably inexpensive, needs
pressing down and no heat.   Used it to preserve the back of a board
that did not need etching.  Did have  a little leakage, but not much.

Harvey

>The problem is that the etchant gets in along the edges of the tape
>unless you press them down really really well.
>
>Best to try a small piece first to see if your tape/etchant will
>exhibit the problem or not. Also clean the board beforehand.
>
>If all else fails mask negative, spray-paint, and peel the tape away
>before etching.
>
>Did you know some types of veroboards/stripboards are very efficiently
>milled/cut and not etched? That may be an option for you.
>
>ST
>
>On Mon, Nov 9, 2009 at 9:46 PM, packrat0_15 <c.hhestand@...> wrote:
>> I have a real simple but sort of large board to make. It's basically just some straight 3/8" wide lines to conduct from one point to another.
>>
>> If it was more complex I would do it with toner transfer. \ufffdHas anyone ever used tape (clear Mylar package tape) for resist?
>>
>> If not the tape what would work?
>>
>> thanks for your answers, Cary
>>
>>
>
>
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