I haven't been here long, but during the time I've been here, I have read a lot of the inky posts and reviews. And anybody who's read these archives knows--Penman Sapphire is regarded as like ,the standard, by many people.
Well, I had a Penman Sapphire cartridge around here, and I decided to see how it compared with some other inks I've got. I did a comparison on a page with DC Blue and Noodler's Blue, and there's about a dime's worth of difference. The Penman Sapphire looks less saturated than either--probably because it does not flow as well as Noodler's Blue or DC Blue.
I'd say it flows a little better than Pelikan Fount India, but definitely closer to Pelikan Fount India in the way it flows than to Noodler's or to DC Blue.
The Penman looks a little duller to me. It's a decent color, for sure, but I'd take DC Show or Noodler's Blue over the Penman, and that's before you consider flow characteristics.
I've only got one cartridge of this ink, but if there's anybody out there who'd like me to mail them a page that consists of a line written in Penman, a line written in DC Blue, and a line written in Noodler's blue, I'd be glad to trade for something similar from you.
I can just scan this page and maybe I will, but I'm thinking a scan would just understate or overstate the differences, which aren't much.
CowDad