Visual authentication
Original diffractive imagery offers a repeatable check under changing viewing angle and light.
Layer relationship
Because the feature is bonded to the credential surface, removal or replacement may affect appearance or structure.
Effective use
Security depends on controlled artwork, material quality, registration and inspector familiarity—not holographic brightness alone.
Scope note
This guide covers legitimate material selection and credential manufacturing principles. It does not describe how to copy or bypass the security of any real government credential.
Related materials and technologies
Continue with driver license card materials, overlay films, the security features overview, or the security technology library.