Maybe PVC primer (the purple stuff) would work as an alterative to spray
paint.
Jeff
_____
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of Kamal Shankar
Sent: Sunday, July 10, 2011 4:44 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: Re: [Homebrew_PCBs] Re: Laser cutting for DIY PCB
>beam (CO2 Beam is an infra red one) as to resist I have use plain black
matt pressure pack spray paint to create brass stencils by this method it is
a little hit and miss in that the paint sometimes does not evaporate cleanly
but if you wipe it over with a paint thinner quickly you can tidy it up.
Then I
>
Hmm.. so it seems that getting a spray paint that does not leave any residue
behind after laser cutting is extremely difficult to find!
One member, either here or some other forum, had posted that they had found
a paint that left no residue, but I did not get any answer when I asked for
a model number.
> etch it with the acid/peroxide etchant the paint is reasonably etch
resistant to this & I have also had great results with the persuphate
etchant as well.
>I use a 40W CO2 Laser for this
>
When you say "reasonably etch resistant", does it mean you get pitting on
lost thin traces?
Also - I noticed that Home Depot carries "Acetone" and "Paint thinner" as
two separate bottles.
Is there a difference between the two regarding using them to clean up
residue from a laser cut board?
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