How Chrome yellow is made:
| Origin: artificial | identical with the rare mineral crocoite (at Mineralogy Database) |
Chrome yellow is artificially prepared, but is identical to the rare mineral: crocoite |
|
| Artificial variety of pigment | Precipitation of neutral solutions of lead salts with chromate or bichromate solutions. |
| In the lab | |
| Materials needed: | lead(II)-nitrate (Pb(NO3)2), potassium chromate (K2CrO4) |
| Safety (MSDSs): | lead(II)-nitrate, potassium chromate (at Fisher Scientific) |
| Method: | 5,1 g Pb(NO3)2 and 3 g K2CrO4 are each solved in 30 ml deionized water and both solutions are poured together. The resulting precipitate is filtered off and dried at room temperature. |
The ground pigment:
Pile of ground Chrome yellow
Other yellows
(intro) - Cadmium yellow/red - Chrome yellow - Cobalt yellow - Indian yellow - Lead-tin yellow - Lemon yellow - Naples yellow - Orpiment - Yellow ochre
(intro) - Cadmium yellow/red - Chrome yellow - Cobalt yellow - Indian yellow - Lead-tin yellow - Lemon yellow - Naples yellow - Orpiment - Yellow ochre
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