Abstract

The method of the present invention comprises coating the surface of particles, such as glass beads, with a first coating, placing the coated particles in spaced relationship within a die so as to expose a portion of that coating, contacting that exposed portion with a second coating of material which forms an adhesive, and pressing the particles while still in the die against an electrode surface for a time and at a pressure sufficient to deform that surface and to bond the particles to that surface by the second coating without crushing the particles. The particles may be imbedded up to about 35% of their average diameter. The second coating is applied by a kiss coating technique utilizing a roller or the like. The electrode is thus provided with strongly adherent, discrete spaced particles which act as a separator to space the electrode from another electrode or the like. The method is simple, inexpensive, rapid and efficient. The coating materials can be selected so as to be highly resistant to chemical and other forms of degradation in use.