Fluorescent highlighter ink for pens and pens in neon green, 30 ml - The sustainable alternative to highlighter for fans of elegant fountain pens - For piston fountain pens, pen with converters, glass and calligraphy nibs - For brushes, pump markers, or to refill dried highlighter - More precise as a highlighter for laws, the Bible, or other small print texts - High color saturation and strong luminosity without fading - Indelible: light-resistant, water-resistant and eraser-proof - Made only from vegan ingredients Octopus highlighter inks meet all the requirements of an indelible ink. All colors are made exclusively with vegan ingredients. Use, cleaning and care: Since these are pigmented inks, it is important to prevent the fountain pen from completely drying out. It should be cleaned immediately after use.