Pens for films
The indispensable ones for overhead transparencies and whiteboards.
For transparencies and whiteboards, special foil pens are needed that can be easily wiped off. For this purpose, a water-soluble ink is usually used in foil pens. The secret of a good foil pen is to still have brilliant colors and high resistance to accidental smudging under these conditions. High-quality foil pens such as the STAEDLER Lumocolor 316 effortlessly meet these requirements, are refillable and available in many colors: individually, or in color-sorted cases.
By the way: With a line width well below 1mm, foil pens are also great as fineliners for working on paper!