I did not realize that Metallized Capacitors ("Condensers") were developed by Bosch in Germany in WWII and taken-over by the US government.
Smaller, cheaper, for many reasons. Zinc is about the cheapest conductor. Zinc vapor is thinner than any foil we can wind. Just spray, no heavy rolling. Zinc vapor will burn-back at any defect in the paper, "self healing", over-rate your paper. Actual foil caps have become rare except atom-bombs and a few audiophiles.
Smaller, cheaper, for many reasons. Zinc is about the cheapest conductor. Zinc vapor is thinner than any foil we can wind. Just spray, no heavy rolling. Zinc vapor will burn-back at any defect in the paper, "self healing", over-rate your paper. Actual foil caps have become rare except atom-bombs and a few audiophiles.
