What is Rare Earth?

Understanding Rare Earth Elements

Rare earth elements are a group of 17 metals, including lanthanum, cerium, and others within the periodic table. Despite the name, rare earths are not scarce – they are widely distributed in the Earth’s crust but rarely found in concentrated deposits. These elements are critical to many advanced technologies, from electronics and energy storage to aerospace and green building materials.

Lanthanum (La) – The Core of Easyto Technology

At Easyto, our products are powered primarily by Lanthanum (La). Lanthanum is a light rare earth element with a unique ability to interact with solar radiation. It features a high refractive index and stable chemical structure, making it an ideal material for applications requiring clarity, durability, and strong optical performance.

Unlike metallic coatings that oxidize or fade, Lanthanum-based materials remain stable over time. This allows Easyto’s films and coatings to deliver long-lasting infrared (IR) and ultraviolet (UV) blocking performance without compromising visible light transmission.

The Science – 4f Orbitals & LSPR

What makes rare earths special lies in their 4f electron orbitals. These orbitals enable a phenomenon known as Localized Surface Plasmon Resonance (LSPR), where solar infrared and ultraviolet radiation are absorbed, converted, and re-radiated away through the atmospheric window. This process is fundamentally different from reflection, providing a smarter and more stable form of thermal insulation.

Rare Earth vs. Traditional Materials

Traditional Low-E glass and titanium-based coatings rely on thin metallic layers to reflect heat. While effective initially, they are prone to oxidation, reduced clarity, and weaker IR rejection over time. Rare earth–based solutions, particularly those using Lanthanum, deliver:

• ✔ Superior IR and UV blocking performance
• ✔ High visible light clarity
• ✔ Long-term durability with no oxidation
• ✔ Better thermal comfort in both summer and winter

From Science to Application

Easyto integrates rare earth nanotechnology into real-world solutions, including SmartShield™ Window Films, Quantum™ Nano Rare Earth Films, and EnduRE30C™ Coatings. By harnessing Lanthanum’s unique properties, these products help reduce cooling loads by up to 40%, improve occupant comfort, and support carbon neutrality goals.

Sustainable by Nature

Rare earth–based insulation is a passive, maintenance-free solution that saves energy without consuming power. By blocking unwanted heat in summer and retaining warmth in winter, our technology reduces reliance on HVAC systems, lowers carbon emissions, and contributes to a more sustainable built environment.