Determination of the density of various magnet wire insulations

Judging by the number of inquiries received during the course of a year, there appears to be a reasonable interest in the density of various magnet wire insulations. The determination of the density of such insulations appears, on paper at least, to be a very simple procedure. It involves weighing the coated wire in air, weighing in water, stripping the insulation from the wire, weighing the stripped wire in air and then in water. Water was chosen because its specific gravity is close enough to 1.00 so that volumes are equal to weight of water displaced.