Chalk PNG

Chalk PNG

Blackboard chalk is not made from real chalk. Board chalk is used to write on hard objects. It is made from calcium sulfate. Because chalk is softer. A wood eraser or water can be used to erase chalk writing. Usually, blackboard chalks are sold in the market as 5 cm long. Larger size chalks are also available for children to write on the floor. The reason for children's use on the streets is that it is not permanent, and it is easily erased when the surface comes into contact with rain or water.