A dry erase board works because its surface is non-porous, allowing marks to be easily wiped away.
The Science Behind Dry Erase Boards
The key to a dry erase board's functionality lies in its surface material.
- Non-Porous Surface: The reference states dry erase boards are manufactured with a non-porous material. This prevents the ink from being absorbed.
- Special Ink: Dry erase markers use ink that contains a colored pigment, a polymer binder, and a solvent.
- Easy Removal: Because the board is non-porous, the ink sits on the surface. The polymer binder allows the ink to be wiped away easily, leaving no residue.
- No Moisture Needed: The text highlights that "this non-porous material can be written on and then immediately erased, without applying moisture or spray".
- Practicality: "The immediate removal of text is one feature that makes whiteboards and dry erase boards far more practical than traditional chalkboards."
Dry Erase Board vs. Chalkboard
Here's a quick comparison:
| Feature | Dry Erase Board | Chalkboard |
|---|---|---|
| Surface | Non-porous | Porous |
| Writing Medium | Dry erase markers (special ink) | Chalk |
| Erasing | Dry cloth or eraser | Eraser (often leaving residue) |
| Cleanliness | Generally cleaner | Can be dusty |
Why Choose a Dry Erase Board?
- Convenience: Quick and easy to erase.
- Cleanliness: Less messy compared to chalkboards.
- Reusability: Can be used repeatedly without damaging the surface (if properly maintained).
