LCR Hallcrest, the international Leader in Color Change Temperature Indicating Technology and Graphics, specializes in the formulation and microencapsulation of liquid crystal mixtures and the development and manufacture of products, pigments, inks and paints that change color. Liquid crystals are chemical compounds and mixtures that exhibit the mechanical properties of liquids and the optical characteristics of solids. Liquid crystals that change color with changes in temperature are known as thermochromic liquid crystals (TLC`s). Their scientific name is cholesteric liquid crystals. Microencapsulation is the process that is primarily used to stabilize and protect the liquid crystals. It also makes them easier to use. This capability allows the manufacture of exciting color change graphics that can be used in a wide variety of applications across many industries. These range from simple novelties like the well-known mood-ring, originally made in the 60`s to the high precision required to monitor human temperature reliably and reproducibly during surgical procedures. We offer an extensive portfolio of standard products supplemented by a full custom manufacturing service.