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Homebrew PCBs

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Message

Re: Have you ever had PCB material that simply will not accept a toner transfer?

2005-11-04 by lcdpublishing

Hi ALan,

I tried pre-etching this morning and it may have helped.  

After going through 12 sheets of Pulsar paper, I emailed them (Frank) 
and he suggested I use a laminator rather than an iron.   THe unit he 
recommended for .062" thick boards is $129.00 right now - I will wait 
till they go on sale.

Anyway, back to my pre-etch.  On small test samples this proved to 
help a lot.  I was testing traces from .005" to .100", even the small 
ones were staying put.

However, as soon as I tried on a bigger board, the toner wouldn't 
stick again -grrr.  The next time I am making boards - hopefully 
tomorrow or Sunday, I will try a longer pre-etch to see if that helps 
on the bigger boards.

Thanks again for all your help and suggestions!

Chris



>   Actually the very best thing is to simply pre-etch the board.  
Clean 
> it some first, then etch until it turns the rosy pink, then rinse 
with 
> distilled water.  The board surface should then be about as good as 
it 
> will ever get, so then try the transfer.  If it won't work after 
that, 
> no amount of other board prep is likely to work.
> 
> Alan
>

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