Asahel wrote:If you insist on using "doctored" inks better get a dip pen instead.
That is in fact what I ended up doing.
I can't speak to the effectiveness or magical properties of the ink as such, being that it was only a smaller part of a larger picture, but it did its part without bleeding or otherwise getting in the way due to doctoring (I wrote on papyrus, your mileage may vary with differently absorbent materials).