Oh, this is wild:
What an amazing ink! Completely impractical (loads of shimmer and smeary sheen) but oh so great! On the bottle it says “Shimmer & Sheen”, and shimmer & sheen it does! — I thoroughly enjoyed this ink in a broad Pilot Parallel Pen 3.8 mm and also in a Pilot Custom Heritage 912 FA (which did not clog). The line in the CH 912 became a bit wider after a while, so the ink did gunk up the nib a little, but it did write for all the 6 weeks I had it in the pen, and so did the Parallel Pen.
So, don’t be afraid of that shimmer!