#Erase marker free

#Erase marker free

The water should cause the ink to break free from the surface of the bowl, and the hydrophobic nature of the silicone polymer will protect it from dispersing, causing the drawing to float. Wait for it to dry, so all the solvent is gone, then fill the bowl with water. Try drawing on the inner surface of a bowl with a whiteboard marker. Dry erase markers, however, use silicone, a lubricant that prevents the ink from bonding with the surface.ĭry erase ink’s water resistance means you can also have a little fun. Permanent markers contain acrylic, which dries to create that telltale shiny finish and acts as a protective coating for the ink. While both pens work identically on paper or fabric because they are porous materials (the ink gets trapped in the pores), on a smooth surface – such as a whiteboard – the polymers change the final result. The difference between permanent and dry erase markers comes down to the final ingredient: the polymers in the solution.

Hence why both types of markers dry out and won’t work if you leave the caps off – the solvent has been exposed to the air. Once the felt touches the surface, the exposed solvent (usually isopropanol) begins to evaporate, leaving only the sticky ink resin, which binds to the surface through van der Waals forces. These components are responsible for the marks left when you write with the pen. They have mostly the same ingredients, too: both contain water, along with preservatives, pigments and solvents.

They contain a polyester reservoir to store their ink and a felt tip that soaks it up and deposits it on the board. Permanent and dry erase markers – such as those you use on a whiteboard – have identical structures. That’s the board covered let’s move on to the pens. Whiteboards are great until stained, but dry erase markers can save the day