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Mystery of R

The scarlet color of copper began production during the Edo period, 300 years ago. This secret production method is only passed from father to son.

All of the materials should be pure and produced in a special way. More heart than technology is required for production. Success is only achieved by efficiently carrying out each step in the process, in the correct order, omitting nothing. A skilled worker knows the perfect timing to produce the scarlet color from pure copper. In order to achieve a cloudless, clean scarlet color the copper must be pure.