How is Vulcanized fibre made that s used for pickup bobbins and coil forms used by Fender, Duncan, Fralin and older Gibson P-90 and Guild bobbins?
George W. Creighton Jr. who was the Material Engineer for the National Vulcanized Fibre Co. writes. Vulcanized fibre is produced in a number of different grades. The final grade depends upon the starting material. Saturating a grade of absorbent paper is the base material for Vulcanized fibre and may be made form cotton rags or wood pulp of high alpha cellulose content. The paper is immersed in a zinc chloride solution, the resulting chemical action causes the individual cellulose fibres to swell and become covered with a layer of gel. Plies of gelled paper are bonded together under controlled heat and pressure to produce sheets of desired thickness. Vulcanized fibre tubes are made on round mandrels and rods are produced by cross-sectional strips cut from sheets and turned to the required diameter. Vulcanized fibre can be formed by cutting, punching, tapping, milling, shaping, sanding, etc. Methods are described in the (NEMA) National Electrical Manufacturers Association publications.
Related Questions
- How is Vulcanized fibre made that s used for pickup bobbins and coil forms used by Fender, Duncan, Fralin and older Gibson P-90 and Guild bobbins?
- Many pickup manufactures use Vulcanize Fibre to make coil forms and bobbins. How is it made and what are other specifications and uses?
- What kind of coil wire is used on a Fender pickup?
