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The last method to remove small particles is to use a continuous precoat renewal or CPR process. A CPR is a high-pressure nozzle that travels across the face of the drum on the side where mud is lifted out of the vat. The CPR operates in medium and high-pressure modes. In the medium mode, the CPR removes about one-quarter inch of the precoat mud. In the high-pressure mode, the shower removes all of the line mud all the way down to the wire and cleans the wire's surface. It takes about an hour to travel across the drum. Multiple medium pressure cycles can be performed before performing a high-pressure cycle. Cleaning the wire this way reduces the need to drop the sheet off the wire for cleaning, offering consistent delivery of lime mud to the kiln.