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Jewellers' Rouge Precipitated from Copperas, Ure 1839
Benjah-bmm27 (Wikimedia Commons) · Public domain
Charlie

Created by

Charlie

14. October 2026DE
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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.
Intermediate
Two days

Instructions

1

Two solutions

Dissolve the copperas in warm water in one jar and the washing soda in water in a bucket. Weigh both.

Materials for this step:

Ferrous SulfateFerrous Sulfate250 g
WaterWater3 liters

Tools needed:

Washing SodaWashing Soda
Balance ScaleBalance Scale
Glass JarGlass Jar
BucketBucket
Rubber GlovesRubber Gloves
2

Precipitate

Pour the soda solution into the copperas solution slowly, stirring, until no more solid forms. Let the solid settle.

Tools needed:

BucketBucket
Wooden Stirring PaddleWooden Stirring Paddle
Rubber GlovesRubber Gloves
3

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.

Materials for this step:

WaterWater10 liters

Tools needed:

BucketBucket
Glass Funnel - StemmedGlass Funnel - Stemmed
Filter PaperFilter Paper
4

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.

Tools needed:

Evaporating DishEvaporating Dish
Sand BathSand Bath
5

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.

Materials for this step:

WaterWater2 liters

Tools needed:

Mortar and PestleMortar and Pestle
Glass JarGlass Jar
Evaporating DishEvaporating Dish
Sand BathSand Bath
6

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.

Materials for this step:

TallowTallow40 g
BeeswaxBeeswax20 g

Tools needed:

Double BoilerDouble Boiler
Shallow Metal PanShallow Metal Pan
Wool FeltWool Felt
7

How much rouge

Loading Jupyter Notebook...

Materials

4

Tools Required

14

This blueprint makes

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Fine Rouge Powder

Free

8
0
1
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Jeweler's Rouge

Free

0
0
1
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Polishing Compound

Free

188
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