' Guo Moruo, 'Chinese History Manuscript', the first edition of Chapter 3, Chapter 3 The second section 'the red copper they extract is very pure, except for the natural trace (0. It can be made into all kinds of things and decorations.2%) impurities, no artificial tin or lead alloys..

Although the hardness of red copper is poor, it can be directly beaten. It has good electrical and thermal conductivity, excellent plasticity, and is easy to be produced by hot and cold pressure. Pure copper refined from sulfide or oxide copper minerals can be used to make inner conductor core wire of RF cable money and make utensils.' It features high purity, fine arrangement, and extremely low oxygen content. Ming and Song Yingxing 'Tiangong Kaiwu·Copper' 'All copper is used for the world, when it is released from the mountain and out of the furnace, there is only red copper.1 red copper road sign 0.Red copper is pure copper, also called red copper. Products requiring excellent electrical conductivity.

The initial quality is just red copper. No pores, trachoma, porosity, excellent electrical conductivity, the surface of the electro-eroded mold has high precision, after heat treatment technology, the electrode has no directionality, suitable for fine production, with outstanding thermal conductivity, manufacturability, ductility, and corrosion resistance Wait. Many are used to make wires, cables, electric brushes, and special electrolytic copper for electric sparks. [2] Namely red copper. It is mixed with calamine or Japanese lead, and the color is turned into brass; it is made into white copper with other medicines; Alum, nitrate and other medicines are refined into bronze; Guangxi Shenhe is ringing copper; Japanese lead and writing 'diarrhea' are cast copper

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