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This polymerization system, which is based on an acridine dye, stabilizers, and a borane compound, was the first to overcome the "300-nanometer ceiling," the size limit of UV and blue-light-driven polymerization in a dispersed medium.

Hirst's 1992 Acridine went for £601,000 and Mouth, by Gilbert and George, sold for £145,000.

Orange.—Chryso�dine, phosphine, acridine orange, tannin orange.

Yellow.—Auramine, benzoflavine, thioflavine T, acridine yellow, homophosphine, rhoduline yellow.

To detect DNA and RNA, the Army team used acridine orange, a fluorochrome dye that easily unites with the nucleic acids and shines brightly under ultraviolet light.