zǐ​ní

seal ink

紫泥 zǐ​ní
seal ink
Purple ink used for stamping seals.
imperial decree
A term for an imperial decree. In ancient China, letters were sealed with clay; the emperor of the Han dynasty used purple clay for this purpose.
purple clay
A type of fine, purple-colored clay (zisha) found in Yixing, Jiangsu, used for making teapots and other pottery

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