I grabbed a sample of L'Artisan Pastellier from Lisa Vanness when she visited Seattle last month. You can find the ink at Vanness Pens here. I'm not really sure when I would use this color, but let's take it for a spin.
Olive is well, and olive color, with some shading.
I had a heck of a time getting the color to display correctly. In the pictures and scans the ink looked a lot more gray than it did on paper. (I color correct everything in Lightroom).
There is just a little bit of green sheen on the pooled ink.
Dry time: 13 seconds
Water resistance: Low
Show through: Low
On 32 pound copy paper the ink behaved well, I didn't have any issues.
Ink swabs for comparison, left to right (top to bottom for RSS): Papier Plume Streetcar Green, L'Artisan Pasteller Olive, and Rohrer and Klinger Alt-Goldgrun. I think Streetcar Green is the closest green, but it does shift just a bit darker than Olive does. Click here to see the L'Artisan Pastellier inks together.
I used a Pelikan m800 Brown Renaissance, medium nib on Tomoe River paper. It had a nice smooth flow.
Overall, the ink is well behaved, and I like the tiny pop of sheen in the flex nib, because the green sheen is really interesting. I don't think this ink is one I would use really often though, just because I tend to prefer brighter colored ink.
Disclaimer: I was given a free sample of this ink. All photos and opinions are my own. There are no affiliate links on this page.