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What quality control and in-house lab capabilities do you have?

Top operates in-house QC with: GC-MS (β-ionone / ionone-series floral fingerprint), GC-HS (headspace, solvent residue), refractometer / melting-point apparatus (concrete grade), Karl Fischer moisture, analytical balance (yield), plus titration and sensory panel (sweet apricot/peach osmanthus note). Heavy metals per food-safety / Cosmetic Safety Technical Specification.

Out-of-spec lots are blocked. We can arrange third-party verification (SGS, Eurofins) at buyer cost and keep retention samples for re-testing within shelf life.

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บทความนี้เผยแพร่เมื่อ 2026-09-22 และอัปเดตล่าสุดเมื่อ 2026-09-22 โดยจะมีการปรับปรุงเนื้อหาอย่างต่อเนื่อง

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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. test