Touch up mistake on toner transfer?

[jtaormina]

Anyone have a good way to do touch up on a toner transfer to copper clad? I got 99% of the toner to stick but a tiny spot got screwed up. I'd hate to re-due it. I was thinking some nail polish maybe? My wife said she as a nail polish pen that has pretty good accuracy. I seem to recall nail polish will resist the ferric chloride. Any ideas?

[stringsthings]

A good sharpie can work.  Testors enamel paint works very well.  I believe nail polish will work but others can verify.
I often have to touch up toner transfers to copper clad and nearly all of them turn out fine.

[Marv Mod]

Yep that will definitely work. It's also useful stuff to use on enclosures when etching if you either want to protect a large area quickly or touch up spots, just like you're doing here.
Good luck!

[flanagan0718]

A fine tip sharpie always works for me.


Sent from my iPhone using Tapatalk

[jtaormina]

Hey thanks guys. I tired the sharpie and it seems kinda smudgy to me. the coverage doesn't seem as 'hearty' for a lack of a better word. Maybe I should let it dry and layer the sharpie a little bit. I also need a fair bit of accuracy. I'm about to etch a face plate, couple letters didn't turn out ideal.

[matmosphere]

Has anybody tried using litho crayons for this stuff? I've been considering giving them a try.

[flanagan0718]

Hey thanks guys. I tired the sharpie and it seems kinda smudgy to me. the coverage doesn't seem as 'hearty' for a lack of a better word. Maybe I should let it dry and layer the sharpie a little bit. I also need a fair bit of accuracy. I'm about to etch a face plate, couple letters didn't turn out ideal.

I've only used it for PCB traces. I do go over it a couple times to get it "darker". I haven't tried it with lettering. Could you remove the entire word and try re-applying the mask? I have reapplied sections of a layout with sucess before.

[selfdestroyer]

A fine tip sharpie always works for me.

Same here.

Cody

[daleykd]

What everyone has said about Sharpie is true.  Make it dark with a few 'layers' of Sharpie.

Please be mindful: we're talking about on copper clad with FeCl3 here.  Sharpie or nail enamel (for da ladeeeez!) works fine with FeCl3.  For enclosures, if using NaOH, neither work.  (I realize that's a bit OT, but it's my $0.02 of knowledge for the morning.)

[jtaormina]

Thanks guys. I went with the sharpie trick using a fine tip and got pretty good edges. I was surprised the sharpie resisted the ferric chloride. A little smudgy but not real bad. A new sharpie worked pretty good.  I heated the ferric chloride to about 95deg F which helped it etch much faster. Bottle said 135F but I got a little nervous with the stuff. I'm pretty new with it.  I actually spilled a little on an aluminum tray I use in my junk toaster oven for powder coating and it of course took off chewing it right up. Pft.  Anyway it worked well. I'll post some finished pics after I get it liquid tinned and envirotext covered.

Thanks to Cody for your etching guide and Stomptown for a link to it!!

[gül]

I use the Action Marker they sell at Small Bear. IMO, it works way better than a Sharpie cuz you only need to hit it once.