I tried to touch some of the particles and they "melted away" into blue ink. My ink used in the pen is Florida Blue and it is less than 1 month old.
There are some solids that do not melt away in the water -- black color with ridges.
Sorry, this is the best macro I can take.
Any thoughts?
I kept flushing the pen until the amount of discharge is minimized in particle size and quantity. But they are still coming = (
I do believe they are the cause of the scratchy feel on the nib and some choking, too.