Tono & Lims E=mc2 is a green fountain pen ink with gray undertones and fluoresces in UV light! E=mc2 is in the Tono & Lims Star Light Line.
Tono & Lims is a Japanese brand whose inks are a collaboration with South Korean ink producer, Lim's Lab.
- Volume: 30ml
- Bottle Material: Glass
- Color: Green
- RGB: 116, 153, 70