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How do you ensure batch-to-batch consistency for this wintersweet oil?

Consistency starts at the field: blossoms are harvested at the same winter flowering stage from fixed collecting areas, then distilled on standardized water-steam or SFE-CO₂ parameters. Every batch is released on GC-MS fingerprint match to a retained reference plus density/refractive index checks.

Consistency Management

ItemDetail
Harvest controlFixed flowering stage, Dec–Feb, fixed origins
Process controlStandardized steam / SFE-CO₂ parameters, same equipment
Analytical releaseGC-MS fingerprint vs. retained reference (96–100 constituents)
Physical releaseDensity 0.880–0.940, RI 1.455–1.485 (20°C)
Retained samplesHeld for at least 24 months per batch
  • Contract supply can blend winter harvest runs to balance seasonal variation
  • A pre-shipment sample from the exact batch is available on request

Ask for a batch-comparison file (GC-MS of two consecutive batches) to verify the stability for yourself.

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Guilin Four Seasons Sunshine

Founded in 2006, Guilin Four Seasons Sunshine F&F Co., Ltd. is a natural plant extract manufacturer and OEM/ODM partner in Guilin, China, combining proprietary Living-Fragrance physical extraction with supercritical fluid extraction to deliver pure, traceable botanical ingredients to global food, flavor, fragrance and personal care brands.