Removing coatings from cathode ray tubes or parts thereof.

摘要

In a method of removing a coating from a cathode ray tube, for example a carbon (graphite) coating on the exterior of a glass body or funnel (10) of the tube, the tube is at least partially immersed in a bath (30) containing an alkaline liquor such that at least the coating is immersed in the liquor, and the liquor is subjected to ultrasonic excitation, for example by transducers (34) disposed in the liquor (32) in the bath (30).