Homebrew PCBs

Stefan Trethan wrote:
> On Sun, 04 Mar 2007 22:55:27 +0100, Jim Hutchinson <jhutch17@...>  
> wrote:
>
>   
>> I'm still learning ... if you have a good "rip-off" paper why not say
>> the make and source so I can have the same results ... I have used some
>> commercial  image transfer paper and the results was not remarkable ...
>> I have also pulled the paper off when it is still hot (about 30 seconds
>> after transfer) ... this leaves half the toner on the paper and pin
>> holes are a problem ... a very thin coated paper used in magazines I
>> think would be near "rip-off" but I have not found any where I shop ...
>> Jim KI6MZ
>>     
>
>
> I'm now using verbatim glossy photo paper A4 100 Sheets 210x297mm 150gsm  
> for use in inkjet printers Reorder number 38996
> It can be seen here but i do not know the life expectancy of the link,  
> click through to printer connsumeables, inkjet paper from the root if it  
> has perished.
> <http://www.verbatim-europe.com/index/product_view.php?menu1=product&menu2=161&menu3=264&lang_id=1&article_id=264>
>
> This paper is relatively thick, but the glossy surface allows finer  
> resolutions and no pinholes in large black areas. It is not extremely easy  
> to remove, but with the right method it's quick. For copper transfers  
> immerse the paper in water, scratching the back side helps. A few seconds  
> is enough, but if you have other stuff to do leaving it a couple minutes  
> makes things easier. Then start to roll the paper away with your thumb.  
> you can either start in the center by wearing a hole through the paper by  
> rubbing, or you can start at an edge. You should print a wide outline  
> around the real PCB especially if you start rolling from an edge. Once you  
> have taken off the first roll there will be wide flakes of paper left in  
> some areas where the paper has split. If you have only moistened the paper  
> a few seconds dunk it again to get everything wet. Roll the larger flakes  
> away too. Now take a piece of flexible foam rubber. Firmly rub the foam  
> rubber over the board. This will take away all smaller flakes of paper,  
> and if you rub slightly more you can get a jet-black finish without  
> residue for decorative transfers, using this paper. Now etch.
>
> I have gone into as much detail as i could, writing this took much longer  
> than the actual process.
>
> ST
>   
Thanks for the info Stepfan ... it sounds as my paper is similar to 
yours (I will go to their web site) ... I find paper manufacturing 
company's for the retail market will not even describe the nature of the 
coating ... the glossy coating on the paper I use is clay ... some 
others are polyvinyl alcohol ... I will try the rapid paper removal 
procedure you outlined this afternoon ... I just never got up enough 
nerve to "Rip" it off before ... I made a small board this morning using 
my procedure and I couldn't expect any better results ... even from a 
photo process ... the IC's I am using have a uSOIC (RM-08) foot print ...
Jim KI6MZ
>
>
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