| abstract |
The invention relates to a thermochromic liquid-crystalline medium containing a liquid-crystalline host mixture and an active component, a thermochromic ink or printing ink which contains such a thermochromic liquid-crystalline medium encapsulated in a translucent polymeric material, the use of a thermochromic medium or a thermochromic ink or printing ink in decorative Applications such as pigments, inks, printing inks and colors, in cosmetics, in thermodiagnostic applications such as medical thermography, in thermometry, in optical and electro-optical applications and in security applications and devices, a security marking or device containing a thermochromic liquid-crystalline medium or thermochromic ink or printing ink and a document of value with such a security marking. |