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To restore the decorative surfaces of buildings such as Strawberry Hill House, the English Gothic Revival villa in Twickenham built by Horace Walpole in the mid-1700s, or an 18th-century townhouse for the artists Gilbert and George in Spitalfields, London, he employs obscure hues like blue verditer, first concocted in the 17th century.

Verditer, ver′di-tėr, n. a light-blue pigment, essentially a hydrated cupric carbonate—Green verditer is the blue pigment changed to green by boiling.

Green.—Verdigris, green verditer, and mixtures of blue and yellow.

Verdigris and green verditer also give greens.

Copper carbonate is also the basis of the valuable blue to green pigments verditer, Bremen blue and Bremen green.