The standard Platignum refill is good quality but restricted in colour and line width options.
We have tested and found that the Pilot G2 gel rollerball fits the Platignum pens - this refill is available in extra-fine, fine and broad in up to 9 vivid ink colours. The Pilot G2 refill is well-known for smooth writing and strong colour. See the G2 refill range here.
