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Storage prior to hulling

This topic explains best practices for storing dried coffee cherries or parchment before hulling, and how storage conditions affect quality, safety, and market value.

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  • Coffee Basics Nerds
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Article 7 of 12 in Dry Processing (Natural) Details/
Storage prior to hulling

Importance of Storage

  • After drying, natural coffees must be stored properly before hulling (removing husk/parchment).
  • Poor storage leads to moisture reabsorption, mold, pest infestation, or flavor loss.
  • Proper storage preserves quality until milling and export.

Storage Forms

  • Dried whole cherries: Traditional in naturals, especially in Ethiopia and Yemen.
  • Parchment coffee: Common in other regions; outer husk/parchment remains until milling.

Key Storage Parameters

1. Moisture Content

  • Must be 10–12% before storage.
  • Higher moisture → mold, mycotoxins.
  • Lower moisture → brittleness, loss of aromatic compounds.

2. Packaging

  • Traditional: Jute or sisal bags—breathable but vulnerable to humidity.
  • Modern: Hermetic bags (e.g., GrainPro) prevent moisture and pest entry.
  • Bulk silos/containers: Used in large estates and cooperatives.

3. Environment

  • Temperature: Cool and stable to prevent condensation.
  • Humidity: Relative humidity < 65% to avoid rewetting.
  • Ventilation: Prevents heat and moisture buildup.
  • Cleanliness: Keep warehouses pest-free and sanitized.

Risks of Poor Storage

  • Mold and ochratoxin contamination.
  • Pest damage (weevils, rodents).
  • Absorption of odors (chemicals, smoke, fuel).
  • Cup quality loss: musty, flat, or faded flavors.

Storage Duration

  • Properly stored naturals can last up to 12 months with minimal quality loss.
  • Specialty lots ideally exported within 6–9 months for peak freshness.

Best Practices

  • Monitor warehouse temperature and humidity.
  • Use pallets to keep bags off the ground.
  • Rotate stock (first in, first out).
  • Regularly cup stored lots to track quality.

Lasting Importance

Storage prior to hulling is a critical control point in natural processing. Proper storage safeguards the farmer’s investment, ensuring that carefully dried cherries maintain stability, safety, and flavor integrity until final milling and export.

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Coffee Basics Nerds

Written by : Coffee Basics Nerds

Expert coffee historians and brewing enthusiasts dedicated to sharing the rich heritage and techniques behind your perfect cup of coffee.

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