Why Is My Whiteboard So Dirty?
If you have an old, well-used whiteboard in your classroom, you might see something a little strange -- ghosts! But not the spooky, bust-able kind... these are the ...
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If you have an old, well-used whiteboard in your classroom, you might see something a little strange -- ghosts! Not the spooky kind If you are seeing those, that’s up to you Just the ghosts of lectures past -- faded words and numbers, or a smudgy stain. Dry erase markers are designed to write on smooth, hard surfaces and erase without a trace. So how come they’re sometimes so hard to erase? And how can you get rid of the leftover marks? The ingredients of a dry erase marker actually aren’t all that different from a permanent marker. Both have three main components: solvents, pigments, and polymers. The solvent is the liquid that carries all of the other ingredients inside the marker. And after you write something, it evaporates. Usually, markers use ethanol, which is the ...
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If you have an old, well-used whiteboard in your classroom, you might see something a little strange -- ghosts! Not the spooky kind If you are seeing those, that’s up to you Just the ghosts of lectures past -- faded words and numbers, or a smudgy stain. Dry erase markers are designed to write on smooth, hard surfaces and erase without a trace. So how come they’re sometimes so hard to erase? And how can you get rid of the leftover marks? The ingredients of a dry erase marker actually aren’t all that different from a permanent marker. Both have three main components: solvents, pigments, and polymers. The solvent is the liquid that carries all of the other ingredients inside the marker. And after you write something, it evaporates. Usually, markers use ethanol, which is the ...
