From Tom's Studio:

'Our Highlighter Inks are designed to work seamlessly with the Ori Refillable Highlighter – delivering bold, high-impact colour with the flexibility of a refillable system. Vivid, punchy and made to be used generously, these inks bring instant clarity to notes, plans, sketches and creative thinking. 

Available in six fluoro shades, each ink is formulated for strong colour payoff and smooth flow through fibre-based tips. Whether your customers are topping up their Ori or experimenting with colour in calligraphy or dip work, these inks are made to stand out on the page.

Our highlighter inks can be neatly divided into two categories: Green and Purple are dye-based, while Yellow, Blue, Pink and Orange contain pigments to give their vivid colour.

Generally speaking, the pigment based highlighter inks are not compatible with other Tom's Studio pens and will cause the reservoirs or tips to become clogged – with the exception of calligraphy and dip pens.

That said, the Green and Purple highlighter ink can be used with the Lumos in any of the fibre or brush tips. But please note that they are not suitable for use with the Lumos fineliner or writing tips. If in doubt, do email the team and we'll be able to offer some guidance!'