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How are the four grades ABCD divided and what are the judging standards?

2026-08-31
The four grades are comprehensively classified according to resin content, fragrance layers, material shape and applicable purposes. The grading adopts sensory evaluation as the core judgment method through observing oil veins, touching texture and smelling aroma, complying with local industry universal grading norms, and we will introduce third-party test data later to realize double-standard verification.
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How do you ensure consistent grade and quality for Grade A Qinan agarwood raw materials?
How do you guarantee stable aroma and resin quality for long-term bulk orders?
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