Agarwood Grading: From Ban-tou and Diao-kou to Kyara
Agarwood has no single mandatory national grade, but the trade shares a grading vocabulary. Understanding these words lets you judge sellers' claims. Compare specimens in Chinese Incense Studies · Agarwood Cabinet.
Common grade terms
Ban-tou (board-head): resin on a trunk cross-section, flat like a board; Diao-kou (hanging-mouth): at a branch wound, pendant-shaped; heartwood-oil: at the tree's core, dense and fragrant; shell: thin flakes at bark wounds; insect/ant types from borers; the apex is kyara. Collecting dimensions in the Kyara pillar.
Grade vs. price
Grade language affects pricing, but the core is still resin degree + scent quality + purity. The same term varies wildly between sellers, so never bid on the name alone. Baseline in the Encyclopedia.
Advice for buyers
Treat terms as communication coordinates, not value guarantees; let real scent, traceability and testing speak. Build an olfactory baseline before discussing grades.
(This is industry observation and popular-science summary, not investment advice. Buy agarwood through legal channels with traceable, testable sources.)
Compiled for general knowledge; traditional references are cultural notes, not medical advice.
常见问题
Agarwood Grading是什么？
There is no single national grade standard, but the trade has a shared vocabulary. This article maps terms like board-head, hanging-mouth, heartwood-oil, shell and kyara so you can read sellers' grade talk.
沉香怎么选购？
选购沉香应认准可溯源、可检测的渠道，按用途选择形态（线香 / 手串 / 原料），不盲目追高、不轻信「野生」「沉水」等夸大宣传。
沉香如何保养？
沉香怕潮、怕串味、怕暴晒，应密封、避光、阴凉存放，不同产区分开保存；长期不用的香材定期通风检查，防霉防虫。
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