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2. Oil on copper - Wikipedia

   en.wikipedia.org/wiki/Oil_on_copper

   The old masters prepared the copper for painting first by rubbing it with fine pumice abrasive. The copper surface was then treated with garlic juice which is believed to improve adhesion of the paint. Finally a white or grey ground layer of oil paint was applied as a primer. After drying the copper panel was ready for the artist to begin painting.

3. Verdigris - Wikipedia

   en.wikipedia.org/wiki/Verdigris

   The Statue of Liberty, showing advanced patination; verdigris is responsible for the statue's iconic green colour.. Verdigris (/ ˈ v ɜːr d ɪ ɡ r iː (s)/) [1] is a common name for any of a variety of somewhat toxic [2] [3] [4] copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition.

4. Green pigments - Wikipedia

   en.wikipedia.org/wiki/Green_pigments

   Green pigments are the materials used to create the green colors seen in painting and the other arts. Most come from minerals, particularly those containing compounds of copper. Green pigments reflect the green portions of the spectrum of visible light, and absorb the others.

5. Oil painting - Wikipedia

   en.wikipedia.org/wiki/Oil_painting

   Oil painting is a painting method involving the procedure of painting with pigments with a medium of drying oil as the binder. It has been the most common technique for artistic painting on canvas , wood panel or copper for several centuries, spreading from Europe to the rest of the world.

6. Imperial Fritillaries in a Copper Vase - Wikipedia

   en.wikipedia.org/wiki/Imperial_Fritillaries_in_a...

   Imperial Fritillaries in a Copper Vase is an oil painting on canvas measuring 73.5 by 60.5 cm which was painted in Paris in 1887. [1] [2] It depicts a bouquet of golden imperial fritillaries in a copper vase, the shiny patina of which (surrounded by lavender highlights) "reflects the color of the flowers as the motted wall stands out with a combination of blue, green and yellow shades" with ...

7. Scheele's green - Wikipedia

   en.wikipedia.org/wiki/Scheele's_Green

   The intensity of the color depends on the copper : arsenic ratio, which in turn was affected by the ratio of the starting materials, as well as the temperature. It has been found that Scheele's green was composed of a variety of different compounds, including copper metaarsenite (CuO·As 2 O 3), copper arsenite salt (CuHAsO 3 and Cu(AsO 3) 2 ·3H