The bleed and feathering factor of this ink is incredible. Even when using wide, wet nibs, this ink keeps its cool. I've tried it on all the paper types I own, and I haven't seen any bleeding, feathering, or show-through. It's really incredible. That green goodness stays where it's supposed to.
Another surprising attribute of River of Fire is the dry time. The dry time ranges from 5-20 seconds depending on the nib and paper, but I was shocked to get consistent 8-10 second dry times using a 1.1mm stub (broad side) on Clairefontaine. That's incredible. On other papers, the dry time is more consistent with other inks, coming in around 15-20 seconds in the darker, pooled areas. For most writing conditions, 10-12 seconds seems to be the average.
The flow and lubrication of this ink is also top-notch. It starts consistently, has no issues with skipping or stuttering, keeps well when uncapped for a couple of minutes, and lubricates the nib well. This really helps out when using a wide nib, because the ink flow has no problem keeping up with the amount of ink required in such a large nib.
I'm still only dipping my toe in the Robert Oster well, but I know I'll certainly be trying out others. If there was a "one of each" sampler pack of Oster inks, I'd be all over it. It's a slippery slope, but one worth sliding down if you enjoy unique, well-behaved, nuanced inks that pack a punch.
JetPens has a huge range of Robert Oster inks available, and at $17 for a 50ml bottle they are an excellent value.
(JetPens provided this product at no charge to The Pen Addict for review purposes.)