And if you're still in disbelief, there are some pretty great before-and-after photos in here to prove these products work.

We report a vesicular reaction close to patch-test sites that had been previously marked with an Edding 3000 permanent marker. A 42-year-old housewife and teacher came to our allergy department ...

From ink to graphene: The role of the dye called eosin The study—as part of the European project 5DNanoprinting—was born from an everyday object: a red marker, like those you buy in stationery ...