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How do you ensure batch-to-batch consistency?

Every batch is GC-MS checked against ISO 3515 and GB/T 12653-2008 limits before release, and we blend within a narrow linalool/linalyl acetate window so your formula stays stable order after order.

Consistency Controls

ControlMethod
Composition windowLinalool 20–43%, linalyl acetate 25–47%, camphor ≤1.5%
Physical constantsDensity, RI, rotation and acid value per batch COA
Sensory approvalPanel check of aroma against reference standard
Same-origin sourcingOrigin fixed per SKU to avoid fingerprint drift
Retained samplesEvery batch retained for 3 years for dispute resolution
Natural oils vary slightly by season; our job is to keep that variation inside your usable range. If a batch drifts toward a boundary, we flag it in the COA before you order — never after.

Send us your acceptable spec window and we will confirm we can hold it across your order program.

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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.