I have just joined the FPN. However, I have used Vintage Sheaffer Triumph EF nib FP's for more than a Decade with EES Registrars ink. I flush my pens on a monthly basis with a dilute Vinegar solution, followed by clear water and have had no issues in my Vintage pens. I use this ink in all of my vintage pens and have even been told that while they require a bit more maintenance; the vintage pens usually do very well with IG inks because this was a common ink that was used when my pens were manufactured in the 1940's and 50's and the feeds were designed to work well with them.
I went to Registrars ink for two reasons, it is Permanent and it is a Blue/Black ink that is easy for the Pharmacies in my area to immediately recognize my prescriptions as being genuine because I always use this "weird ink". Some years ago I had a Prescription pad stolen from my clinic and got a call from one of my pharmacists who is a fellow pen snob asking when I started writing with a blue ballpoint. I told him I hadn't and that it was obviously a forged prescription. The passer of the faked prescriptions was caught and arrested when she came to pick up the forged prescription. This saved me from all sorts of trouble.
I just thought I would share my experience with the EES ink.
Thanks for the good laugh. My husband, who isn't really an FP person (even though I keep trying) also thought it was funny -- especially the bit about the "weird ink"....
I've been considering ESSRI for a couple of years, but the shipping charges from the UK were more than the cost of the ink, IIRC. And I have so much ink already that the idea of 110 ml is sort of mind boggling. Although I had considered ordering one of the pens that were recommended, since shipping on the pens was free, to sort of balance out the cost of shipping to the US. At the time I looked at their website (which admittedly was a couple of years ago at this point) the pens seemed to be Parker Vectors. And seemed to have stainless steel nibs from the look of them. So that should allay anyone's fears. I use IG inks in my Vectors all the time, because for the most part they are a bit one the wet side, and that balances the dryness of most IG inks quite nicely.
Ruth Morrisson aka inkstainedruth