Filled with permanent, opaque water-based pigment ink, Posca markers produce an acrylic paint-like effect and can be used on any surface imaginable. The PCF-350 brush-tipped pens are a newer ...

There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers ... experts to determine ...