Which laminate features rainbow colors on the bio page of the e-passport?

The correct answer is Crystagram, which is a laminate that incorporates holographic elements to produce vibrant, rainbow-like colors on the bio page of an e-passport. This feature not only enhances the aesthetic appeal of the passport but also serves as a security measure, making it more difficult to forge. The dynamic color changes that occur as the passport is tilted or viewed from different angles are characteristic of Crystagram laminates.

While other laminates such as prismatic, fluorescent, and reflective have unique properties, they do not specifically create the rainbow color effect associated with Crystagram. Prismatic laminates may produce shiny or color-shifting effects but lack the complex holographic visual of Crystagram. Fluorescent laminates can emit visible light when exposed to certain wavelengths but do not necessarily provide a rainbow color spectrum. Reflective laminates can create glare or shine but do not inherently possess the colorful, dynamic patterns that Crystagram does. Thus, Crystagram is distinct in its ability to feature rainbow colors prominently on the bio page of e-passports.