PIJ printing ink

for paperfor plasticspigmented

Color-shifting ink, also known as optically variable ink (OVI), represents a cutting-edge security technology that exhibits dramatic color changes when viewed from different angles. This sophisticated pigment system creates a vivid chromatic shift – for instance, from green to gold or blue to purple – through precise light interference phenomena at the micron level. Core Mechanisms The ink's magic lies in its multi-layer structure: 1.Light interference filters: Microscopic flakes (5-10μm) with alternating refractive index layers 2.Angle-dependent optics: Constructive/destructive interference of light waves at 15°-90° viewing angles 3.Customizable spectra: Precisely controlled layer thicknesses (50-300nm) determine shift colors Key Security Advantages Instant verification: Color transitions are immediately perceptible without devices Uncopyable effect: Requires proprietary manufacturing with semiconductor-level precision Dual authentication: Base color + shift range provide two security parameters