Dear members of penexchange.de
I hope you will apologize me that I will write my reply in English, sadly my German is very weak and it would be very hard for me to response you in German.
It's hard for me to choose from what to start, I do not want that it would like some kind of advertisement. I simply want to give you overview about my IG inks.
- Those are not standard registars inks - I didn't reinvented the wheel, instead using modern knowledge about metal complexes I was introducing small and constant improvements to more traditional formulas. After some time my inks went quite far away from those older concepts. In my work I was focusing on improving stability of IG inks and they permanency, and also eliminating need of using acids for stabilization of IG inks.
- I'm keeping in mind corrosion problem - I abandoned using mineral acids in my inks almost at the same beginning, with time I started introducing additives to ink which work as corrosion inhibitors. Because of high content of iron ions in IG inks there is no way to remove corrosion problem completely - we can only make it less likely to occur. While using IG inks daily corrosion it is almost impossible to have a corrosion of nib, but if we would leave a pen for very long time - like few months, there is a chance that traces of corrosion might show up on surface of metal parts.
- When I send ink it is free of sediment - I filter all inks at least 2 times, in case of IG inks it is 3 times. I'm using filtration materials with decreasing cut off size, the last one cuts everything bigger than 3-5 micrometers. Everything smaller is not significant for properties of ink. Some time ago I was thinking about using 500 nm PTFE filters, but this would be like shooting from a cannon to a sparrow
I'm filtering using three different materials because this speeds up filtration process, filtering from start on very fine sieve takes a lot of time because pores in sieve blocks quickly.
- a bit more picky behavour of some of my IG inks in comparison to other inks is not connected with higher dye content - but with greater "wetness" of ink - this is something that evolutionary improves. I decided to have better flow and lubrication in my inks and so the same time I sacrificed some of their behavior on paper, generally IG Blues, are best behaved, while they still are significantly more wet than other IG inks.
so this is all for now
Greetings from Dresden