Okay, here are some other random facts about permanent markers.

Permanent marking inks are usually comprised of:

• One or more solvents, pigments or dyes,
  
• A film-forming polymer

• One or more of: surfactants, humectants, biocidals, viscosity modifiers, adhesion promoters or rheology modifiers

The really important parts are the pigment or dye and the film-forming polymer; the other parts exist solely to deliver these. They generally write with high adhesion on nearly all surfaces, including paper, cloth, plastic, wood, metal, glass, and stone. They are waterproof but can be removed with organic solvents, soap and water (on non-porous surfaces), or abrasion.


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