Swisher Pens is now selling two new Baystate colors, Cape Cod Cranberry and Concord Grape. The Cranberry is not waterproof, while the Grape has partial water resistance. Both have the higher PH values that look to be typical of the Baystate 1946-styled formulas. And there is the disclaimer about possible staining, as well.
I think I need to try these. Besides, even a partial resistant purple is better than not at all. If I like it, it will be my new purple.
Swisher Pens