A modern piercing is performed using jewelry and equipment that is either single use and sterile or that has been sterilized in an autoclave sterilization machine.
This picture shows me using the autoclave to destroy the cultures which had grown on the agar plates during incubation.
When the pressure gage reaches zero wait one or two minutes before opening the autoclave.
Can I have an autoclave in an operating theater?
Then the impregnated solid sheets are expanded in a huge low pressure autoclave.