Structural Colour Gets Special Attention at ODDS 2022

Principles of switchable optical nano-cavity (© Peiman Hosseini).

Principles of switchable optical nano-cavity (© Peiman Hosseini).

The phenomena of structural colour – when different wavelengths of light are selectively reflected from a substance, with the remaining wavelengths transmitted or absorbed – is gaining increased attention in the security print industry as an environmentally benign method of creating colour without resorting to dyes or other chemicals.