Kragen Javier Sitaker personal blog
Aluminum foil (2021)
It’s typically 10 μm thick and 400 mm wide, giving it an aspect ratio of 40000 in that dimension, and rolls are commonly some ten meters in length, for an aspect ratio of 1 000 000; heavy-duty versions can reach 30 μm or more. Despite their thinness, foils of 25 μm or more are impermeable to oxygen, water, and light…
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On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Jul 6, 2026 | Aluminum foil (2021) by firephox | 283 | 141 |
