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https://en.wikipedia.org/wiki/Verde_patina
Verdigris is the common name for a green pigment obtained through the application of acetic acid to copper plates or the natural patina formed when copper, brass or bronze is weathered and exposed to air or seawater over time. It is usually a basic copper carbonate (Cu 2 CO 3 (OH) 2), but near the sea will be a basic copper chloride (Cu 2 (OH) 3 Cl). If acetic acid is present at the time of ...Hex triplet: #43B3AE
http://www.webexhibits.org/pigments/indiv/overview/verdigris.html
Today is rarely sold as an artists pigment due to its toxic nature.Verdigris was the most vibrant green available until the 19th century. Often mixed with, or glazed over lead white or lead-tin yellow because of its transparency. The most reactive and unstable of all …
https://edu.rsc.org/resources/verdigris-copper/1952.article
Corrosion is the oxidation of copper; a chemical reaction between copper and oxygen in which copper oxide can be produced. The Greeks and Romans deliberately corroded copper to make a pigment called verdigris. Pliny the Elder (23-79 CE) recorded a recipe for the making of verdigris in his Natural History.
https://www.acs.org/content/acs/en/pressroom/presspacs/2019/acs-presspac-october-2-2019/why-some-greens-turn-brown-in-historical-paintings-.html
Oct 02, 2019 · Now, researchers reporting in ACS’ journal Inorganic Chemistry have uncovered the chemistry behind the copper pigments’ color change. Copper acetate (also known as verdigris) and copper resinate were used in European easel paintings between the 15 th and 17 th centuries. Artists typically mixed these pigments with linseed oil to make paint.
https://pubs.acs.org/doi/10.1021/ed200096e
Malachite and verdigris, two copper-based pigments, are synthesized in this experiment intended for use in a general chemistry laboratory. The preparation of egg tempera paint from malachite is also described. All procedures can be done with a magnetic stir plate, standard glassware present in any first-year laboratory, and household chemicals.Cited by: 13
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