I wrote the same text and test patterns on a Black n' Red legal pad using a Haolilai 801F (what else?). Each of these inks was also used in grading statistics homeworks, which come in on notebook paper of wildly variable quality. Each of these inks behaved fairly well, with little feathering or bleed through on any of the papers.
Of the five that made it onto this page, my favorite by far is the Diamine Orange. It's just a great, true, honest orange that really "pops" off the page. It flowed really well, and was just a blast to use. There wasn't a lot of shading to it, however. It's pretty much full-blast all the time.
After sitting for a while, the PR Orange Crush seems to have turned a little bit brownish on the page. (This was from one of the non-problematic batches; Private Reserve, to their credit, immediately replaced the bottle I'd gotten that was just an awful icky brown.) I'll use up this bottle, but I probably won't pick up another. It was well enough behaved in the pen, and it showed some nice shading as well.
The Herbin Orange Indien is also very nice, if not quite as bold as the Diamine Orange. I initially had some concerns about using it for grading, since it put down a somewhat faint line. That concern was allayed as it dried, however. It darkened up nicely and was quite readable. There's a little bit of shading with it, but somewhat less pronounced than with the Orange Crush.
The last two were a surprise to me. I expected the Diamine Blaze Orange to be even bolder than Diamine Orange. Instead, it turned out to be quite faint. The same held with PR Tangerine Dream. In fact, I'd wondered if I'd accidentally loaded the same ink twice. Both of them were too faint to be usable for grading. I had to empty them out immediately.
Although I took great care to have the pen dried out between inks, it is still possible that some water remained that washed out the Blaze Orange and Tangerine Dream. I don't, however, plan on picking up full bottles to find out!
I still have a sample vial of Noodler's Apache Sunset to test, as well as Noodler's Summer Tanager. I've used the Apache Sunset a little bit for grading, and my experience mirrors others' with respect to its remarkable shading; it's a very dynamic ink. No idea yet about Summer Tanager. I'll post further when I get those samples done.
Anybody who'd like to see a hi-res version of the image below is welcome to contact me back channel.
Don
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