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by dijit
1413 days ago
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I am not kidding when I say this although it sounds absurd to adult me: I was told when I was a kid it was due to racism. I suspect actually it was simply more economical, and probably something to do with chalk dust. I don’t miss chalk dust. |
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However, the chalk dust has been replaced by synthetic colours that can ruin any cloth they come in contact with and are much harder to remove from the skin than chalk.