This module focuses on proper agarwood preparation techniques to maximize oil yield, purity, and extraction efficiency. The right preparation process ensures that the highest quality oud oil is obtained while maintaining sustainable practices.
3.1 Selecting the Right Agarwood for Extraction
Not all agarwood is suitable for extraction. The quality of the resin (oud) significantly affects the yield and fragrance of the extracted oil.
✅ Factors to Consider When Selecting Agarwood:
Resin Content: Higher resin concentration = higher-quality oud oil.
Wood Age: Older infected wood (10+ years) produces richer oil.
Color & Density: Darker, denser wood usually contains more resin.
Infection Type: Naturally infected vs. artificially induced (Fungal or Enzymatic Inoculation).
Avoid using low-resin wood, as it yields poor-quality oil and increases processing costs.
3.2 Drying & Curing Agarwood for Extraction
Proper drying and curing prevent moisture interference and enhance oil extraction efficiency.
✅ Best Drying Practices:
✔ Air Drying: Natural sun or shade drying for 4–6 weeks (preferred for premium oil).
✔ Oven Drying: Controlled heat (≤50°C) for faster drying without degrading resin.
✔ Dehumidifier Drying: Removes moisture evenly while preserving aroma.
Avoid overdrying, as excessive heat can degrade aromatic compounds and lower oil quality.
3.3 Grinding & Particle Size Optimization
Proper grinding ensures maximum surface area exposure for better CO₂ penetration during extraction.
✅ Grinding Recommendations:
✔ Fine Powder (100-300 microns): Best for high-efficiency oil extraction.
✔ Coarse Powder (1-3 mm): Slower extraction but preserves deep woody notes.
✔ Chipped Form: Used for steam distillation, but less effective in CO₂ extraction.
Avoid excessive grinding, as ultra-fine particles can clog the system and reduce extraction efficiency.
3.4 Pre-Treatment Methods for Enhanced Extraction
Certain pre-treatment techniques can improve agarwood oil yield and quality.
✅ Pre-Treatment Options:
Enzyme Pre-Treatment: Breaks down cell walls, making resin more accessible.
Solvent Pre-Treatment: Uses natural solvents (ethanol) for resin softening before CO₂ extraction.
Humidity Control: Maintaining optimal moisture content (8-12%) ensures effective oil release.
Avoid chemical pre-treatment with synthetic solvents, as they may alter the oil’s natural aroma.
3.5 Quality Control Before Extraction
Before processing, quality testing is essential to ensure high-grade oud oil production.
✅ Key Quality Control Steps:
✔ Moisture Content Test: Agarwood should be 8-12% moisture for efficient CO₂ extraction.
✔ Resin Content Analysis: Darker, resin-rich samples undergo preliminary scent testing.
✔ Microbial Check: Ensures no contamination that could affect oil purity.
Avoid processing moldy or overly damp agarwood, as it can reduce oil purity.
3.6 Key Takeaways: Preparing for Maximum Oil Yield
✅ Select high-resin, aged agarwood for extraction
✅ Dry & cure properly to maintain aroma integrity
✅ Grind to optimal particle size for maximum CO₂ penetration
✅ Use pre-treatment methods (enzyme, solvent-free) for enhanced oil yield
✅ Conduct quality control before extraction