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Old 11-07-2017, 08:31 AM
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tbzep tbzep is offline
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Quote:
Originally Posted by hcmbanjo
I did a search and this came up:
fishpaper An insulating paper, often fiber- or oilcloth-like, used in the construction of transformers and coils. [Historical Note: Alvin G. Sydor writes: "In 1729 Stephen Gray made the discovery of the conducting and non-conducting power of different substances. Gray found that by using woven silk served as an excellent insulator. Some years later it was found that the paper industry could provide what was equivalent to woven silk. Later it was discovered that if the paper was saturated with fish oil its ability as an insulator was much improved particularly when used in harsh environments and high voltages."

Yes. If you remember taking apart electrical things as a kid, many times a flat square of the material was wedged in or screwed down between components. I don't see it used much that way these days. It usually varies in color from a medium grey to almost black, with green hues and blue hues. I've even seen some that had a rusty red color, but I 'm not sure if it is considered fish paper. I doubt today's fish paper uses fish oil, but it might. Seems like epoxy resins would be the way to go and would explain it's strength/stiffness.
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