He also objected to my mentioning the use of vinegar in the manufacture of iron gall ink because, basically, according to him, it wouldn't work for various reasons involving Ph and ion release and suchlike chemical stuff. Well, I have no practical knowledge of whether it works or not, and can only point to the transcriptions of various medieval ink recipes mentioning either vinegar or wine that have been published and say, well if it doesn't work, they wrote it down anyway. Check out Inks and Pigments and follow the external links.
An odd thing was that only a day or so previously I had received a request from somebody at the BBC who was making a program about oak forests and wanted to know if I would pop down to a bosky grove with them and whip up a batch of iron gall ink next week. I pointed out that I live in Australia and don't actually make my own ink. Apparently they found somebody more useful, so when the program appears, watch it and see if they use vinegar. It must be the oak gall harvesting season or something.
The only thing that came out of this was that I discovered that a couple of links I had on the subject were out of date. Fixing these was the first work I had done on Medieval Writing in a couple of months, so I figure it is about time to do something about that. Some more paleography coming up soon.