Ink Review: J. Herbin - Stormy Grey Grade: 68.75% Paper Tested On: Norcom Composition, Staples 20lb, 85g Clairefontaine, 90g Rhodia, Post-it Note. Disclaimer: I do not have a bottle of this ink. I've only used samples. J. Herbin Stromy Grey (JSG) is the first and only ink that I have ever used t...