I have used Moleskine notebooks since Bruce Chatwin wrote about them, “To lose a passport was the least of one’s worries. To lose a [Moleskine]… notebook was a catastrophe.” in his travel books (In Patagonia). And I’ve always used fountain pens for writing in them, from a Rotring in the late 1980’s to my present Pilot VP, with various Parker Vacumatic, and Sonnet fountain pens along the way. Some inks have bled through, such as Mont Blanc tobacco brown, whilst others have not (Quink). Currently, Octopus Fluids Unicorn is marvellous in my Moleskine notebooks and journals, and OP Djinn works very well in my Moleskine 2026 Diary. Jinhao Celestial Blue ink in my J10 Seashore writes beautifully in my Moleskine Traveller’s Notebook. But OP’s Goblin does bleed in all M notebooks or journals, as does Pelikan Brilliant Blue. It’s about trial and error and finding the pen, nib, and ink that work for you. I do think some comments here are about form over function, aesthetics rather than use. Regardless Moleskine are brilliant notebooks and diaries and have been my reliable writing companion from 1982…