The spelling of the word "crystallized or distilled verdigris" can be quite tricky. In IPA phonetic transcription, the pronunciation of "crystallized" is /ˈkrɪstəlaɪzd/ while the pronunciation of "distilled" is /dɪsˈtɪld/. Verdigirs is pronounced /ˈvɜːrdɪɡriːs/. The word "crystallized" refers to the process of forming crystals, while "distilled" refers to the process of purifying a liquid by heating it and condensing its vapors. "Verdigris" is a greenish-blue pigment formed on copper or brass. So, "crystallized or distilled verdigris" can refer to the process of producing a purified or crystalized form of the pigment.
Crystallized or distilled verdigris refers to a specific form of a greenish-blue pigment that is obtained through a process involving the chemical compound called copper acetate. Verdigris, also known as copper(II) acetate, is formed by the reaction of copper with acetic acid. The resulting compound can vary in appearance, ranging from a bluish-green color to a bright turquoise hue.
The term "crystallized" in this context implies the formation of crystal-like structures within the verdigris pigment. This crystallization occurs when the liquid copper acetate solution is allowed to slowly evaporate or cool down. As the solvent evaporates, solid crystals of verdigris start to form, giving a distinct texture and visual aspect to the pigment.
Additionally, the term "distilled" refers to the process of purifying the verdigris pigment. Through distillation, unwanted impurities or substances are separated from the copper acetate, resulting in a more refined and concentrated form of verdigris.
Crystallized or distilled verdigris has been used for centuries in various artistic and decorative applications such as painting, coloring ceramics, staining glass, and producing dyes. Its vibrant greenish-blue shade, often associated with natural patina, lends a unique aesthetic appeal to different art forms. However, due to its copper content, which can be corrosive, appropriate care must be taken during its handling and application.
Cupri acetas neutralis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.