19818 Dragon Series Pink 4.5 oz

This ink is wild — the fluorescent pink actually glows under a blacklight, and it dries completely waterproof in about 20 seconds on my cheap paper. The free pen that came with it is a nice bonus, but the bulletproof quality is what sold me for signing documents.

Was slightly worried the color would look too neon on paper, but it dries to a vivid pink that's somehow both loud and readable. The ink is waterproof too, which I tested by running a page under the tap after it dried.

That fluorescent pink actually glows under a blacklight, and it’s completely bulletproof once dry—I scribbled on a receipt and ran it under the faucet, not a single smear. The free pen writes smooth enough for daily notes, and the 4.5 oz bottle feels like it’ll last me years.