Thanks again Bonfim.
Whew... research today:
I spoke with Robert at Kremer Pigments, Inc.
Their Bistre and Sepia ink does have a shellac base
He did say he just made a batch of Iron Gall ink which he is going to bottle and sell. I am not familar with this this and just wonder if it's a darker/blacker ink than the Bistre. It does not have a shellac base.
If you are interested:
Bullocks' Iron Gall
1-800-995-5501
[email protected]