I wanted to switch to permanent bulletproof inks long time ago. I was happy with my current colors after a long process of testing and trying new ones until I defined my palette. Adding the superpower of waterproof (and more other properties) could be a plus. Since I know the colors I want the task seemed easy. Just find a new brand with those colors and try.
Expert's voices about archive and conservative materials pushed me to change. It looks like cleaning and restoring a notebook in the future could be much easier with these bulletproof inks otherwise the inks goes away almost like magic. Have a look at this video to see by yourself.
Rohrer & Klinger is my first attempt. The colors are amazing, exactly what I was looking for. And the color's names very original for inks! I chose Carmen, Frida, Emma and Klara for this trip.
It's quite risky to start a new long trip without testing them in deep but I had to do it. New year, new trip, new notebook and... new inks.
Result of investigations coming soon!