Homebrew PCBs

Acetone... ONE to ONE?

Wow.
when I increased my acetone to anything more than the 16 drops aclcohol 
to 6 drops of acetone I had
drastic resutls real quick where the toner just instantly disolved and 
washed away.

WHAT IS YOUR TONER from ? Mine is HP laserjet
IS YOUR TONER FROM a BROTHER laser printer?



On 10/05/2016 12:56 AM, Harvey Altstadter hrconsult@... 
[Homebrew_PCBs] wrote:
>
> Alan,
>
> I use a mixture of 1:1 Acetone and Denatured Alcohol. Both from Home 
> Depot. Both are inexpensive. Skip the grain alcohol, except for 
> celebrating your results. I run a film of the mixture onto the board, 
> and then put the artwork down onto the wet film. I let it sit for 
> about 20 seconds and then press down. While I am waiting the 20 
> seconds, I flood the top of the artwork with more of the mixture. At 
> that point I run a brayer over the board in the x and y directions for 
> about a minute. By that time, the board is usually pretty dry. When it 
> is completely dry, I drop it into the sink with some water, and let it 
> sit for about 15-20 minutes. I peel off what ever peels off, and then 
> rub the rest off with my fingers. The paper I use is the shiny, but 
> not coated brochure paper. I tried to use some form the Viking River 
> cruises catalogs we get once a week, but the paper was too thin for my 
> printer.  The purpose of the brayer is to improve adhesion, especially 
> at the edges of the pattern. I bought a 6 inch one on ebay for a few 
> dollars. I was floored that first time I tried it this way. I had had 
> success without the brayer, but always had issues at the edges of the 
> artwork.
>
> Harvey
> On 10/4/2016 4:46 PM, alan00463@... [Homebrew_PCBs] wrote:
>>
>>  Tried the "cold toner transfer" process today using what I had
>> at home, acetone and 80-proof vodka (40% alcohol by volume) for my 
>> solvent.
>> Printed the PCB artwork on standard, white, office paper using my HP 
>> Laserjet. Using the 8:3 mix and didn't get any transfer to the copper.
>>
>> So I dabbed the solvent onto the other toner patterns on the paper
>> and let it set half an hour before I tried rubbing it off again.   
>> Still wouldn't lift off the paper. D'OH!   I forgot to print it  onto 
>> something slippery.   So I printed four patterns on Oracal 651 vinyl 
>> for another go at it.
>>
>> Did everything according to the video, but the part where the paper 
>> and plastic are supposed to peel off the board, leaving the toner 
>> still sticking, failed miserably.
>>
>> So I added another capful of acetone to the bottle, put the cap back 
>> on and shook it up,  and tried again.  No results.
>>
>> I repeated the above two sentences about three more times.   Still 
>> the toner did not detach from the Oracal.  So I let put a few drops 
>> of solvent onto a different piece of Oracal with a toner pattern 
>> printed on it, and let it sit about half an hour.
>> Then I could rub the toner off with my thumb, but it took a good bit 
>> of pressure to lift the toner from the plastic.
>>
>> This was my first try to use the  "heatless" toner transfer.   I think
>> I'll buy some 100% ethanol (grain alcohol) and try again later in the
>> week, unless somebody has a better idea.
>>
>>
>
>