Homebrew PCBs

As far as I know Staedtler Lumocolor red is the best resist ink.
It is still available and I am not aware of any change in the formulation?

ST

On Sun, Feb 28, 2016 at 11:38 PM, Brad Thompson brad.thompson@...
> Re: using a plotter-- IIRC, some years ago it was possible to buy a superior
> acid-resistant plotter ink which disappeared from the market because one
> ingredient was toxic or carcinogenic (I don't recall which, but it may have
> been a red-colored ink).
> Thanks again!
>
> 73--
>
> Brad  AA1IP
>