using a 1.5 mm bucket I'm out 25kVAC

In particular, Wickelkondis HV technician jobs  a relatively high inductance, while training at the buckets should be very low. Which means in turn high pulse currents. And it depends but we can be, but also with smaller buckets say: lack of space.
For additional insulation (who knows what it all is: hihi:) you could put a thin film of oil between them.
Am looking forward to the first EimerSGTC. What would be more interesting is a capacitor from a PVC roll floor covering (or the thin "wallpaper" option) with aluminum foil in between
Pond liner with aluminium in between, or aluminium paper oil hodgepodge
Why is anything invented all nose long if proven yet affordable and almost self induction free Selbstbaukondis available?
Are 5 euro too expensive? Can no one make? Or are really so much more beautiful bucket and pond liner? Or is it around to panschen trend in the housing with oil? I'm guessing a bucket is much easier to cover than plastic wrap (in your case bag) with aluminum foil
The danger of low, air in shorts in the Condi is mainly to have. Would argue just sexes, that a bucket capacitor multiples of the operating voltage of your capacitor holds out, carbon Carbide.
When using a 1.5 mm bucket I'm out 25kVAC or 30... 40kVDC dielectric strength well by 20.... The freezer bags have forced air in there (the bucket also). Also, they do not belong in oil because they just need one. Air is therefore irrelevant in there. So far, the buckets were just tested with 6 KV. Already worlds lie between 6 and 15 KV in the HV Kondi area! A completely different again is 25 kV AC Schnack!

Time, I assume that you can operate this bucket hardly still makes sense with voltage of 20 KV. The space is small (edge due to rollovers) and widen the already thick Koronas. The bucket due to the large border zone with the associated Koronas even with the much despised Leydener (mineral water) bottles are competitive (bring the also over 1 nF per piece and ultimately have a similar Platzbefarf).

Regarding dielectric strength: when my capacitors, turning the required number in series for Spannunghsfestigkeit. That reduced the Corona against 0 you can do of course also in buckets. Only the bucket design is still pointless (anyway very low due to the wall thickness capacity falls further into the bottomless pit).