Would you ever know this laundry basket was dark grey from being covered in soot? Our restoration technician Sharon placed it in our Ultrasonic Machine. This machine uses cavitation bubbles induced by high frequency pressure (sound) waves to agitate a liquid. The agitation produces high forces on contaminants adhering to substrates like metals, plastics, glass, rubber, and ceramics. In this case very little discoloration was left on the basket, and the homeowner was left with less to repurchase for their Chiefland home.