Abstract: A method of producing a hard roll capacitor includes winding on a core a capacitor roll using heat shrinkable synthetic resin strips some of which are metallized while maintaining tension on the strips above about 200 grams per inch of strip width per mil thickness. The roll is then subjected to temperature sufficient to shrink the strips on the roll after which the roll is placed in a casing and its ends are covered with a dielectric liquid. The process results in a capacitor with only a narrow margin section of the roll at the edges being wetted by the dielectric liquid.