There is a passion in my DNA for ‘permanent’ fountain pen ink! Having used every product available, I have found all to be very good with ONE EXCEPTION. After 5 years of stubbornly refusing to admit that there is a problem, I have now concluded that Diamine Archival Registrar's Ink is not safe to use on a long-term basis.
First a little background. I have 35 pens in my collection, so I have decided to associate specific inks with specific pens. This facilitates regular use and helps keep all my pens in ‘writing’ shape’. I routinely clean with tap water flushes with each fill up. This is followed-up with periodic ‘deep cleaning’ using distilled water and J. B.’s Perfect Pen Flush at least twice a year for all pens.
Diamine Archival Registrar's ink was paired with my Lamy Scala (gold nib added). Like most people, I freely admit to being reluctant to acknowledge growing problems when it comes to my collection. However, I now realize that right from the get-go, the Lamy Scala was not a "smooth" writer. It always felt scratchy and it was sometimes difficult to get ink to paper. For the first couple of years I put that down to "breaking in" a new gold nib and kept using this combination. Also, when submersed in water and then dried, the ink appeared light when compared to other products (e.g. deAtramentis, Rohrer & Klingner, Private Reserve Invincible Black, Platinum Carbon).
I am aware that this product is a traditional gall-based ink which requires strict cleaning of the pen using it. Therefore, I regularly (4 times a year) conducted a "deep clean" procedure, centered on the use of distilled water and J.B.'s Perfect Pen Flush. After this cleaning, writing was smoother, but it always reverted to the scratchy feel. I also had to frequently dip the nib into clean water in order to get ink flowing again. Of course, I chose to ignore it - must be a long breaking in period for the gold nib I thought.
It got to the point that I blamed the Lamy Scala – I came to see the Lamy (even with the expensive gold nib addition) as a second-tier pen. In other words, OK but not great - what a mistake! I decided to investigate further (finally!) and read on the FPN that this ink was associated with ‘corrosion’ I checked my Scala and sure enough, corrosion had started to eat away the pen barrel near the nib.
I then decided to try an experiment. Since my Lamy Studio was an excellent writer (it too had a gold nib added) I changed the ink in the Scala after a VERY thorough deep cleaning. I substituted Montblanc Mystery Black for the Diamine ink. The change was immediate and dramatic – like magic the smoothness of the Scala was equal to the Lamy Studio. What a difference! My confidence in this pen was immediately restored – clearly the ink had been the problem.
I had been warned about the use of the Diamine Archival Registrar’s ink on several occasions which I chose to ignore. I tried to make this product work with a very good fountain pen for five years without great success. Not only did it not perform well but it seemly facilitated corrosion. For these reasons I would strongly recommend that FPN members NOT use this product under any circumstances.