Why Don't Colors Separate in Permanent Markers?

Permanent markers don't dissolve in water.

Permanent markers are made up of a colorant, resin and a carrier or solvent. Markers are housed in air-tight cases to keep the carrier from evaporating. If the carrier evaporates the markers will not work.

Features

A permanent marker should remain permanent for at least three months The colorant is usually made up of pigment, which lasts longer than a dye and fades less in sunlight. The solvent is alcohol-based; once the alcohol evaporates, the mark becomes permanent. The resin in the marker allows it to adhere to the surface you are writing on.

Reason

The marker is permanent because it is hydrophobic, which means it is not easily dissolved in water. Water will have no effect on any marks you make, and the color will not separate.

Cleanup

Rubbing alcohol changes the chemical composition of the marker back into its usable form. If you use the marker in the wrong place, adding alcohol is the most effective way to remove it.

References

• Making Science Fun: Sharpie Pen Science
• Odec: Permanent Markers