To make a charcoal mask at home using glue you'll need some charcoal tablets that you can get through Amazon or other stores.
Split or crush the charcoal tablets up, pour some PVA glue into a bowl and then mix the charcoal tablets that you crushed up into the bowl of the PVA glue.
Then continue to add the crushed charcoal tablets until the charcoal mask mixture is pure black in color.
Then just apply the charcoal mask to your face after that.
The PVA glue can be purchased through Amazon as well.