J. Herbin Diabolo Menthe is named after the popular French beverage that bears the same name, made from green mint syrup and either lemonade or 7-Up (I found differing recipes). In either case, the model for the ink is a very diluted green color, with bubbles.
The J. Herbin take on the diabolo menthe has many similar characteristics as the drink. The ink is very faintly green and I described it as "frosty" even before I found out that the drink it is modeled after is carbonated. Where the model and the product differ, however, is that I would describe the ink as a teal, with more blue than green. But, then again, I did find both to be refreshing.
The above image is my full page review of the ink, taken with a flash. Click for full view.
This above image is the same review, taken without a flash. Click for full view.
While writing on the wonderfully smooth 90 g Clairefontaine paper in my new Quo Vadis Habana journal, I experienced no feathering, no bleedthrough and no nib creep.
Overall, I found Diabolo Menthe to be a nice, cool, teal with a very wintery feel to it. While I don't think I will be using Diabolo Menthe as an everyday ink, and I don't have any current plans for it... I will think of something. After all, winter is right around the corner, and this is just the color ink to get me into the spirit of the season.
NOTE: Winter is my favorite season of them all, and I can't can't can't wait for it to get here.