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Jewellers' Rouge Precipitated from Copperas, Ure 1839
Rouge is fine red iron oxide, the last polish for metal and lenses. Ure (1839) gives the best polishing powder: add soda solution to copperas solution, wash and dry the precipitate, and heat it gently in shallow vessels until it turns a deep brown red. Grind and wash it fine, and bind some in wax and tallow as a bar.
The picture: iron(III) oxide powder.
中级
Two days
说明
1
1
Two solutions
Two solutions
Dissolve the copperas in warm water in one jar and the washing soda in water in a bucket. Weigh both.
此步骤所需材料：
硫酸亚铁250 克
水3 升所需工具：
洗涤碱
等臂天平
玻璃罐
水桶
橡胶手套2
2
Precipitate
Precipitate
Pour the soda solution into the copperas solution slowly, stirring, until no more solid forms. Let the solid settle.
所需工具：
水桶
木搅拌桨橡胶手套3
3
Wash
Wash
Pour off the clear liquid, fill with fresh water, stir and let it settle again. Repeat several times, then drain the solid on filter paper.
此步骤所需材料：
水10 升所需工具：
水桶
带颈玻璃漏斗
滤纸4
4
Calcine gently
Calcine gently
Dry the solid in a shallow dish on the sand bath, then keep heating it gently, stirring now and then, until it is all a deep brown red.
所需工具：
蒸发皿
砂浴5
5
Grind and wash fine
Grind and wash fine
Grind it in the mortar, stir it into water, wait a minute and pour the cloudy water off the coarse grains into another jar. Let that settle, pour off the water and dry the fine powder. This is the rouge.
此步骤所需材料：
水2 升所需工具：
研钵与研杵玻璃罐蒸发皿砂浴6
6
A rouge bar
A rouge bar
Melt tallow and beeswax together, stir in rouge until it is a stiff paste, and pour it into a small pan to set. Rub the bar on a felt or cloth buff to polish.
此步骤所需材料：
牛脂40 克
蜂蜡20 克所需工具：
双层隔水锅
浅金属盘
羊毛毡7
7
How much rouge
How much rouge
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