On Fri, 07 Dec 2012 06:15:54 -0600, Pete Keillor wrote:

On Thu, 06 Dec 2012 23:59:23 -0600, Richard
wrote:

On 12/6/2012 9:00 PM, wrote:
I am gluing some copper to wood with CA. Anyone knows how to get rid
of the white/blue/green discoloration that develops with an
accelerator? It disappears when washed with 99% isopropanol or acetone
but reappears after drying.

I understand that there may be a way to avoid getting the white stuff
by not using so much of the accelerator but is there any way to get
rid of it *after* the fact?

Michael Koblic,
Campbell River, BC


Yeah, don't use the accelerator.

What he said. Accelerator active ingredient is N,N-dimethyl
p-toluidene, a tertiary amine. Amines react with copper to form
quaternary amine complexes. In other words, they eat copper.

Pete Keillor

Or at least go at it knowing that you're going to need to use a polishing
compound that's going to actually remove the material.

I wouldn't expect a CA to wood bond to be secure in the long run. If you
need strength, I think epoxy would be better, or maybe contact cement.

--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?

Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com