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2025-01-09Observation of appearance: High quality paper has a uniform color, usually a natural and soft white or beige. The surface of the paper is flat and smooth, without wrinkles, waves, or unevenness. -
Paper making is one of the the Four Great Inventions in ancient China. During the Eastern Han Dynasty, Cai Lun, an eunuch, improved the paper making process, using plant fibers such as bark, hemp head
