Platinum Leaf Green is a green ink with plenty of shading and a little purple sheen.
This is from their Mix Free line of mixable inks intended to be combined for creating custom colors. Some people will mix any inks together to get certain effects, but inks can be chemically incompatible which could affect the results or their usage. Having a variety intended to be mixed eliminates such problems.
Scans
The shading looks especially good on Iroful.
Photos
At first I thought this didn’t have any real sheen, but there is a definite purple look to it, not just dark green concentrated ink.
No sign of the sheen in writing, though.
Microscope
Not much going on under the microscope, but the shading on Iroful still looks neat.
Chromatography

It starts with a large area of pale yellow then a narrow band of cyan at the end.

The blue band has some glow, but it didn’t result in any glow on the swatches.
Verdict
On its own it’s a nice medium green. I’ve only used it once in a Jinhao 20, and it’s worked well there. I don’t have any of the other inks in this line yet to try mixing as they suggest.
Questions or comments? Contact me on Mastodon