Pens or markers with hard tips, or with solvents that can affect the protective layers, can scratch or damage the data layer; water-based felt-tip pens are safest.
en.wikipedia.org Widely employed for graphic work involving pencil, pen and felt-tip marker, bond paper can sometimes contain rag fibre pulp, which produces a stronger, though rougher, sheet of paper.
en.wikipedia.org We were advised to write our phone numbers and blood groups on our arms in felt-tip pen in case we were hurt or knocked unconscious.
www.stuff.co.nz His tools were consistent, staying with ink, pencil, coloring pencils, and felt-tip pens throughout the years.
en.wikipedia.org A trusty felt-tip liquid eyeliner is always a go-to for creating dramatic wings because it's easy to hold and control.
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