Description:1. To begin, we have to use a PVC pipe that has been split in half and positioned below the blackboard in order to collect all of the chalk pieces and powder.

2. After that, one third of a cup's worth of the gathered chalk powder is dumped into the machine.

3.This machine is used to blend the chalk piece powder. First, 1/4 cup of water should be added to the chalk piece powder mix, and then 1/2 cup of plaster of paris should be added to the watermix.

4. After the mixing process, there will be an aperture at the bottom of the machine; in order to use it, you must first position the moulding tray so that it is below the opening, and then you must open it.

5.After that, give it a setting time of thirty to sixty minutes.

The ability to recycle old chalk trash is one of the benefits.
It is possible to make one's own chalk at home.
CONS: 1.Some processes need to be done by hand (adding water, applying plaster of Paris), which might be an inconvenience.
The form of chalk that is obtained is that of a cube.
This concept intends to reuse and recycle old chalk dust that, in the normal course of events, would be thrown away in the garbage can. This approach recommends changing the chalk dust into fresh pieces of chalk, which will both reduce waste and promote sustainability. Alternatively, the chalk dust might simply be thrown away. It is possible to turn chalk dust into a substance with the consistency of paste by first collecting the chalk dust and then applying a binding agent to it, such as white glue or a combination of glue and water. After that, the paste is moulded into cylinders that have the appearance of regular bits of chalk, and it is left to dry. The fresh chalk pieces that are produced as a consequence of this process may be saved and utilised for tasks such as writing or drawing, making this method of recycling chalk dust both practical and kind to the environment.
, C , C , C , C , Claims:1. As claimed in claim 1, Waste reduction: Recycling old chalk dust into fresh chalk pieces reduces waste. It allows chalk dust to be reused instead of thrown away.
2. A system as claimed in claim 2 ,Environmental sustainability: Recycling chalk dust reduces raw material use and fresh chalk manufacture. This assertion emphasises the idea's environmental benefits.
3. A system as claimed in claim 3, Reusing chalk dust saves resources. It conserves energy, water, and other resources by using fewer fresh resources to make chalk pieces.