porcelain enamel ---- Originally, chalkboards were made from slate, a naturally occurring material. Nowadays, any surface can be made into a chalkboard (like a child's bedroom wall or a kitchen cabinet door for grocery lists) by applying a type of paint specifically formulated for that purpose.
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The chalkboard was ivented in 1820
Yes, chalkboard is a compound word.
I think that a chalkboard is 60 centimeters long
2milliters
chalkboard