My coworkers and I usually draw/write on our white board pretty often. We always use special white board markers, never permanent ones. The last time we did it, we used red and green markers and when it was time to wipe the drawing off, it made a mess but as the smudges were drying up, a text from a couple of months ago started to appear. We wiped that text off months ago. And when we drew on the white board it was absolutely clean. How come the text that was wiped off months ago appeared when we were wiping off our latest drawing?
In: Chemistry
It’s hard to say for sure, but it’s probable that the solution used in old marker had left behind an invisible film, which then caught on to some ink from the new markers when it got wetted a little.
For stubborn marker traces, some rubbing alcohol should do the trick.
fyi.
You can write on a white board with permanent markers. You just use Dry erase markers to erase them. Then you erase the dry erase marker as you normally would.
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