Homebrew PCBs

Just wondering why you are using ORACAL 651.  A brief search didn’t turn up any other postings or web articles using this material for cold transfer.  Paper products are exclusively used as far as I can tell.  The solvent readily penetrates the paper and after it dries, soaking in water makes it easy to remove while leaving the toner on the copper.

Mike N.

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Thursday, October 06, 2016 6:55 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Cold toner transfer FAILURE

 

  

Tried another transfer using ORACAL 651, using a mixture of  half 
acetone and half denatured alcohol    Followed Harvey's directions
and burnished the artwork backside with the backside of a fork
following DuWayne.   The artwork did not transfer.

Tried it again with the same mixture.    This time I put the copper
clad board between two steel plates that I marked with a red Sharpie.
I squeezed them together for ten minutes using two medium C clamps.

This time about a third of the toner transfer from the artwork to
the copper clad--in the middle of the board.    PARTIAL SUCCESS...

Next time, try applying pressure with a pipe clamp.   Better yet,
get a 6-inch brayer.    I see the brayers come in either hard rubber
or soft rubber.   Which kind did you get, Harvey?   I've never used one.