What is blackboard chalk made of?
Blackboard chalk takes gypsum, water and pigment directly. Trace them back and you pass 7 made things on the way to 9 raw materials.
How blackboard chalk is made See it on the map
What goes straight in
From the ground: 9 raw materials
- Gypsum goes straight in
- Water goes straight in
- Iron ore through pigment
- Sulfur through pigment
- Titanium ore through pigment, titanium dioxide
- Crude oil through pigment, carbon black
- Air through pigment, carbon black
- Rock salt through pigment, titanium dioxide, chlorine
- Coal through pigment, titanium dioxide, coke