the.com/chalkboard
Where ideas go to get erased before they're finished, repeatedly, forever.
means A slate surface written on with chalk, used for teaching, lists, or scribbling things meant to be wiped away.
from Straightforward compound: 'chalk,' from Old English 'cealc' (itself borrowed from Latin 'calx,' meaning lime or limestone), plus 'board,' a flat panel. The soft limestone-based chalk sticks let marks go on and off the slate-dark board with equal ease — the whole invention being, essentially, a surface designed for its own erasure.
- original color
- actually black, slate, not green
- green switch
- 1960s, less glare, easier on eyes
- screech cause
- fingernail vibration matches human scream pitch
- status today
- mostly replaced by whiteboards and screens