Comments, with reply, on "Dependence of the electric strength on thickness, area and volume of polypropylene" by S. Cygan and J. R. Laghari

The commenter notes that the conclusion reached by authors of the above-titled paper (see ibid., vol.22, p.835-7, Dec.1987), that there is a much stronger dependence of electric strength on thickness than on area, was also reached by M.G. Danikas (see Conf. Dielectric Materials, Measurements, and Applications, p.9-12, 1988) and by W.R. Bell and M.G. Danikas (see IEEE Int. Symp. Electrical Insulation, p.264-7, 1982) for transformer oil. He discusses some possible factors causing this result. The authors of the original paper add some further comments.<>