In this Tuesday, Sept. 21, 2010 picture, a computer screen attached to an argon plasma torch displays graphs indicating the presence various elements detected during a test for the presence of heavy ... more 
In this Tuesday, Sept. 21, 2010 picture, a computer screen attached to an argon plasma torch displays graphs indicating the presence various elements detected during a test for the presence of heavy metals on samples taken from designs on the exterior of commemorative drinking glasses, in a laboratory at the ToyTestingLab, in Warwick, R.I. Solutions with samples taken by swab from the surface of the glassware were passed through the argon plasma torch as part of a test to determine the presence of metals such as cadmium, lead, and mercury. The combustion of various elements in the samples alters the color of the flame during the test, giving lab technicians an indication of which metals may be present in the sample. less 
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Associated Press | Photo By Steven Senne
Wed, Oct 6, 2010 5:23 PM EDT