Cleanliness is subject to original (smooth) foils:
| Purpose of foil | Aluminum purity | Designation |
|---|---|---|
| Cathode foil | ≥ 99,98 | 1 |
| < 99,98 | 2 | |
| Low-voltage anode foil | ≥ 99,98 | 1 |
| High-voltage anode foil | ≥ 99,99 | 3 |
| Foil for the anode lead | ≥ 99,98 | 1 |
| Foil for cathode output | ≥ 99,98 | 1 |
| < 99,98 | 2 |
- Foil width in a roll:
1) The usable width of the etched cathode foil roll is at least 480 mm;
2) The usable width of the low-voltage anode foil roll is at least 480 mm;
3) The usable width of the high-voltage anode foil roll is at least 480 mm;
4) The usable width of the foil roll for the anode lead is at least 250 mm;
5) The usable width of the foil roll for the cathode lead is at least 250 mm.
- The deviation of the specific capacity across the roll width from the nominal value:
1) Etched cathode foil – +30/-15%;
2) Low-voltage anode foil – ±10%;
3) High-voltage anode foil – ±10%.
