Just curious to see if you used ERNI and what your results were. Why not follow Lindner instructions?: https://www.lindner-original.de/en/...-1111130092/
The only thing is that you would use up the bottles quickly by soaking stamps one at a time. That's not your current problem.
Also is there a list of all aniline ink stamps?
For whatever it's worth, I've never seen such a list and doubt one exists. There are just too many worldwide.