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sdo:abstract
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"To make black solder from copper solder. Take one lot hammer blow (?), one Lot copper ashes, two lot smalt and rub it all together, till it is powder. Rub it on a copper plate and mix it with gummi water, with which you make al light color shadings, particularly the white color. It is very good for white robes, when mixed with saffron yellow, and with lead."
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