Hermetic Seed Containers
Sealed Aluminum-Foil Laminate Seed Packaging System
Multi-layer hermetically sealed containers housing desiccated seeds in inert atmosphere, organized by species and accession number for long-term preservation
Purpose
Provide an airtight, moisture-proof, radiation-attenuating physical barrier that maintains seed viability over centuries by preventing gas exchange, moisture ingress, and oxidative degradation
Context
Primary physical housing for all seed material in the Seed Vault. Svalbard uses tri-layer aluminum foil packets heat-sealed under controlled humidity. Lunar version must additionally resist vacuum conditions and provide some radiation mass-shielding. Each container holds seeds from one accession (population/cultivar) to prevent cross-contamination.
Principles
- ▸Hermetic sealing prevents moisture reabsorption which is the primary cause of seed aging
- ▸Aluminum foil laminate provides an absolute moisture barrier (WVTR effectively zero)
- ▸Inert gas backfill (nitrogen or argon) displaces oxygen to prevent lipid oxidation
- ▸Seed longevity follows Harrington's rule: each 1% decrease in moisture content doubles storage life
- ▸Container material must be chemically inert to avoid outgassing that could damage seeds
Typical implementations
- ▸Svalbard Global Seed Vault: tri-layer foil packets (polyethylene/aluminum/polyethylene), heat-sealed
- ▸USDA National Laboratory for Genetic Resources Preservation: aluminum cans with nitrogen backfill
- ▸Millennium Seed Bank at Kew: glass jars with silica gel and rubber seals
- ▸FAO genebank standards: moisture-proof containers at 3-7% seed moisture content
Lunar considerations
- ▸External vacuum environment means container failure modes differ from terrestrial (outward pressure differential)
- ▸No atmospheric corrosion risk but micrometeorite puncture must be considered
- ▸Container mass contributes to radiation shielding - heavier materials provide secondary benefit
- ▸Thermal cycling during vault access operations must not compromise seal integrity
- ▸Containers must be robotically manipulable for automated retrieval
Specifications
Functional
| primary function | Hermetically seal desiccated seeds in inert atmosphere to prevent degradation over millennial timescales |
| inputs | Desiccated seeds at 3-7% moisture content, Inert gas (nitrogen/argon) for backfill |
| outputs | Preserved viable seeds on demand via container opening |
| seal integrity years | 1000 |
| moisture barrier wvtr | < 0.001 g/m2/day |
| internal atmosphere | 99.9% N2 or Ar |
| container capacity seeds | 500-10000 per unit depending on species |
| total containers estimated | 2000000+ |
Physical
| dimensions | Variable: 10x15cm packets to 5cm diameter canisters |
| materials | Aluminum foil laminate (Al/PE/Al tri-layer), Stainless steel 316L canisters for large seeds, PTFE gaskets, Borosilicate glass ampoules for smallest seeds |
| storage temp c | -18 |
| humidity internal pct | < 10 RH |
| atmosphere | Inert (N2 or Ar) |
Operational
| power consumption w | 0 |
| thermal range c | -196, 20 |
| lifetime years | 1000 |
Interfaces
Provides
- Standardized container form factor for robotic grasping and retrieval
- Container barcode/RFID tag for inventory tracking
- Sealed seed samples for periodic viability testing
Requires
- Properly desiccated seeds at target moisture content
- Storage environment at -18C or colder
- Radiation shielding to minimize cumulative dose to seed DNA
Cite this entry
Lunar Ark Codex. "Hermetic Seed Containers" (L3-GEN-SEED-CONT). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-GEN-SEED-CONT
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.