3 ms·

And whiteboards eventually stop erasing well. There are some huge whiteboards at work that I’ve been trying to resuscitate but none of the remedies I’ve read ab

• abdullahkhalids 3y ago
  Blackboards also stop working eventually. What the means is that repeated writing, erasing, occasionally using water to clean them completely, makes tiny little holes in the paint. Then when you write, the chalk gets into the holes and it doesn't erase well with a standard eraser. So you have to use more water, which causes more damage... Blackboards in universities are often painted over with new paint after a few years. Of course, this is relatively simple maintenance.