Assesses eye protective devices' impact resistance, suggesting a grading system for safety measures.
This paper presents the results of ballistic and. where appropriate, drop‐ball tests on the following piano eye protective devices: (i) goggles fitted with polycarbonate, cellulose acetate, gauze and polymethyl methacrylate lenses: (ii) facesbields with cellulose acetate visors: and (iii) several clip‐on configurations. The results are discussed separately and arc also presented graphically to permit comparison with earlier similar data for allyl resin and thermally toughened glass. These results suggest the need for a gradation of eye protective devices based on impact resistance. Suitable tests, using a 25 mm diameter steel ball and a 3 mm steel ball are suggested.
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E. C. Wigglesworth (1972) studied this question.
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