Chinese codex(2000 edition)said that processing of ruddle is to calcine it thoroghly and quench with vinegar and grind it into meal.
《中国药典》2000年版,
代赭石的炮
要用“煅至红
,
,碾成粗粉的方法”。
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In those first digs, archeologists had found some stone tools and pieces of natural pigment called ochre that they thought were 50 to 60,000 years old, which suggested that humans might have shown up in Australia around then.
在最初挖掘中,考古学家发现了一些石器和称为赭石
天然色素碎片, 他
认为这些东西有 50 到 6 万年
历史, 这表明
类可
大约在那个时候出现在澳大利亚。