Does not seem like this ink, Organics Studio Master of Writing Series volume No. 18 Ernest Hemingway Santiago's Sea Blue ink, has been reviewed in these pages. Perhaps that is because of the bottle it's all but unusable in a fountain pen. The ink is super saturated with dye that sheens like crazy, CRAZY SHEEN. Others have described the ink as pink sheen with teal undertone. Yeah, that's about right if you can get it out of a nib before it dries. I tried it in a Platinum 3776 Century and still had problems. It dries shut the nib just lifting the pen off the paper to move a line. Too bad, 'cause it seemed like a cool ink.
Well, finally I diluted the ink 1:1 (50%) with ddH2O. Some inks won't survive this level of dilution, it would thin out the color too much or diluted additives cause a dry feeling, or maybe cause undesirable behavior on the paper. Not this ink, 1:1 dilution turned it into a usable, interesting, and beautiful ink. Not only is the dark teal color attractive, it still sheens a lot, and there is also some shading potential. Use in a broad, or even better a stub/italic nib for best effect. Very good ink now even for this lefty but I seriously doubt it will survive at water bath. Not much water resistance if that matters to you.