or dip pens. India ink is drinking water soluble, nevertheless you'll find waterproof India ink, which has shellac in the mixture. Acrylic ink is water-proof when dry, so you can paint with different levels without worrying about the paint reactivating. Airbrush ink can be a form of acrylic ink https://fernandojbshv.bloggactif.com/37355679/top-ink-pen-drawing-techniques-secrets