![]() This is because fabric doesn’t have a smooth surface, so the ink can soak into its pores-staining them forever! In real permanent markers the resin used is an acrylic polymer that functions as a “binding agent” and makes the ink stick to the surface. You might know dry-erase markers can stain other surfaces such as clothes permanently. This is why the ink can easily be wiped off from a very smooth nonporous surface such as a whiteboard or glass. In a dry-erase marker the resin is an oily silicone polymer, which acts as a “release agent.” This makes the ink of the marker very slippery and prevents it from sticking to the whiteboard’s surface. In addition, a resin or polymer is added, which is the key to making the ink erasable. This is used to dissolve the color pigments that determine the marker’s color. They include a solvent, which is usually some kind of alcohol. ![]() This is possible because dry-erase markers contain special ingredients. The writing from these markers can easily be erased from the whiteboard without leaving any marks. To draw on this surface, your teacher probably uses a whiteboard pen or dry-erase marker. ![]() You might have a whiteboard in your school classroom. It turns out they are also perfect for doing science! These markers are usually used to write on whiteboards or glass surfaces and can easily be erased. ![]() What makes this possible is the interesting chemistry of dry-erase markers. Have you ever wished your drawings would come alive and the stick figures or objects on your paper could move around? It’s not as impossible as it sounds! In this activity you will make your drawing move around by letting it float on water. ![]()
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