Blackboard FAQs:

Q: Were blackboards originally made of smooth?

A: Yes, and thin sheets of black or dark grey slate stone.

Q: Are blackboards made of a rougher version porcelain enamelled steel?

A: Yes, Porcelain is very hard wearing and blackboards made of porcelain usually last 10–20 years in intensive use.

Q: Are blackboards difficult to date?

A: Yes, but they were used for music education and composition in Europe as far back as the sixteenth century.