Homebrew PCBs

At Sat Feb 3, 2007 11:57 pm ((PST)), dpersuhn wrote:
>Does anyone know what these inks are like (electrically speaking)
>after drying?  I'm just wondering if it's reasonable to print a
>component mask without worrying that the ink may affect circuit operation.

It's purely a guess but if I had to bet on it I would expect
the colour inks to be a finely divided organic ink with a
binder which might be an acrylic - all organic, so probably
high resistivity.

However, I wouldn't be surprised to find the black ink contains
at least some carbon black in the same binder, so the resistivity
is more questionable, especially at high voltages.

So it might be better to do black as a colour mix.

But as I say, just a guess.


Regards, LenW