I am Otto, learning about pigments. As a benchmark in the pigment industry, Lanxess has always been in a leading position. Today, I will learn about the application of Lanxess Colortherm® Chromium oxide green series in plastics. If there are any errors, please help me correct them.
Chromium oxide green serves as a high-temperature-resistant colorant in glass formulations. When added in concentrations ranging from 0.1% to 2% by weight, Cr³⁺ ions dissolve into the glass matrix, creating distinctive green hues through selective light absorption in the 450–550 nm wavelength range. Unlike organic dyes, Cr₂O₃ maintains color stability at temperatures exceeding 1200°C, making it ideal for container glass and architectural glazing.
Cr₂O₃-doped glass demonstrates enhanced UV absorption below 400 nm. This characteristic is exploited in: Pharmaceutical packaging to protect light-sensitive drugs; Museum display cases to prevent artwork degradation; Automotive glass for reduced interior fading. Studies show 1.5% Cr₂O₃ addition blocks 98% of UV-B radiation while maintaining 85% visible light transmittance.