Pale Verdigris

Verdigris

Verdigris is a common name for any of a variety of somewhat toxic copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition. Once used as a medicine and pharmaceutical preparation, verdigris occurs naturally, creating a patina on copper, bronze, and brass, and is the main component of a historic green pigment used for artistic purposes from antiquity until the late 20th century, including in easel painting, polychromatic sculptures, and illumination of maps. However, due to its instability, its popularity declined as other green pigments became readily available. The instability of its appearance stems from its hydration level and basicity, which change as the pigment interacts with other materials over time.

Colorfulness

Colorfulness, chroma and saturation are attributes of perceived color relating to chromatic intensity. As defined formally by the International Commission on Illumination (CIE) they respectively describe three different aspects of chromatic intensity, but the terms are often used loosely and interchangeably in contexts where these aspects are not clearly distinguished. The precise meanings of the terms vary by what other functions they are dependent on.

pale

Adjective

1. Light in color.
2. Having a pallor (a light color, especially due to sickness, shock, fright etc.).

Verb

1. To turn pale; to lose colour.
2. To become insignificant.

verdigris

Noun

1. A blue-green patina or rust that forms on copper-containing metals.
2. Copper acetate.

Verb

1. To cover or coat with verdigris.