Homebrew PCBs

I agree.  After that message, I went back out to the shop and put 
some ink on a PCB to let air dry.  After about an hour or so (don't 
know the exact amount of time), I rubbed my finger over it and some 
of the ink came off on my finger.  

I am going to leave it overnight and see if any more rubs off 
tomorrow. 

I did hit the test sample that I etched with the hot air gun.  I 
would have expected that to "Cure" the ink.  I did get the board hot 
enough where it was very uncomfortable to hold by it's edges.  So, I 
would have thought the ink was cured by that point.

I won't be around much tomorrow so I can't do too much more.  Over 
the week though I am going to try some other things if the ink 
doesn't dry up in the cartridge.  

At this point though, I know the ink will act as a resist. I also 
know it won't bead up on the copper.  Like you guys, I suspect that 
proper drying is key.  So, that is what I am going to focus on as I 
have time - getting the ink to dry, perferably quickly.

Chris



--- In Homebrew_PCBs@...m, "Randy Ledyard" 
<rll_groups@...> wrote:
>
> Chris
> 
> What about this? I see it as being like water-based paint. If you 
wash a
> semi-gloss paint the day after you put it on, you will get some 
paint coming
> off ... but wait a week or two, and the paint holds up to repeated 
water
> exposures. Now I know the ink is probably not "curing" in the same 
way the
> paint is, but if there was some residual water content in the ink 
when you
> put it in the FeCL3, you could be redissolving some of the ink. 
That's why I
> think John's suggestion has some merit.
> 
> Randy
> 
> > -----Original Message-----
> > From: Homebrew_PCBs@yahoogroups.com
> > [mailto:Homebrew_PCBs@yahoogroups.com]On Behalf Of lcdpublishing
> > Sent: Saturday, April 15, 2006 4:38 PM
> > To: Homebrew_PCBs@yahoogroups.com
> > Subject: [Homebrew_PCBs] Re: RE : Epson durabrite ink tests - I 
have ink
> > -no printer...
> >
> >
> > Hi john,
> >
> > That would be a good test, but it won't show me much with the 
crude
> > tests I am doing.  It really needs to be tested on an actual
> > printer.  The thickness of the ink is a critcal part in this and 
I
> > can't apply an even film with what I have to work with. So, with 
an
> > uneven film of ink, the results at best will be "uneven" ;-)
> >
> > Chris
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com, John Popelish <jpopelish@>
> > wrote:
> > >
> > > lcdpublishing wrote:
> > > > Well, it looks to me like someone with an epson printer that 
has
> > > > durabrite ink has to give this a go.
> > > >
> > > Might you try baking the Durabrite in a warm oven or under a 
lamp
> > for
> > > a while?  It might take a while for the ink to cure into a 
tough
> > solid.
> > >
> >
> >
> >
>