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Subject: Re: [Homebrew_PCBs] Heatless (cold) Toner Transfer for PCB making

From: rolohar@...
Date: 2016-01-14

"The alcohol is there to dilute the acetone so it does not dissolve the toner completely."

Correct.

The alcohol acts as an "inhibitor" to the agressive nature of the toner in dissolving the polymer toner.

I'm beginning to believe that any spirit compound that will dissolve the toner will work,
and that any type of alcohol will inhibit the agressive action of the solvent.

Pick the "cocktail" that you like the best, and perfect your technique.

Roland F. Harriston, P.D.
∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
From: "camillus camillus_blockx@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com>
To: "Mike k4gmh@... [Homebrew_PCBs]" <homebrew_pcbs@yahoogroups.com>
Sent: Thursday, January 14, 2016 10:14:31 AM
Subject: Re: [Homebrew_PCBs] Heatless (cold) Toner Transfer for PCB making

 

HI, You do not need an more concentrated alcohol. All you need to do is experiment with the amount of acetone. It is the acetone that makes the toner sticky. The alcohol is there to dilute the acetone so it does not dissolve the toner completely. 


So you started with 8/3 alcohol/acetone then do a 7/3 and try the transfer again. By changing this ratio you will find a right solution.

succes
cb

On 1/14/2016 10:30:01 AM, Mike k4gmh@... [Homebrew_PCBs] <homebrew_pcbs@yahoogroups.com> wrote:

 


Tried the"heatless" toner transfer process using what I could find at home, acetone and rubbing (isopropyl 70% by volume) alcohol. Printed the PCB artwork on standard, white, office paper. Using the 8:3 mix didn't get any transfer to the PCB. Upped the ratio to 8 parts alcohol to 6 parts acetone. Did get a good transfer, but some of the toner came off the board while trying to remove (rubbing) the paper residue left when the paper was pealed off. This was my second try to use the "heatless" toner transfer.

Some things to try is to let the alcohol-acetone saturated paper fully dry on the board (didn't let the paper fully dry the second attempt), let the paper soak in water longer before removing (may put some dish washing soap in the water). Will try to find a more concentrate alcohol to use (will have to adjust the alcohol acetone ratio with a higher alcohol concentrate).

This process looks promising enough to keep experimenting to come up with a mix, process that works for me."

  Mike, K4GMH