Chromatic Properties of Thermochromatic Ink

Dynamic pigments in combination with static pigments can be used to achieve changeable prints. For example a large billboard commercial with a message that changes over time. One type of dynamic pigments are the thermochromatic pigments, which are used in these experiments. They are characterized by their ability to undergo reversible colour changes with temperature. When heated to a specifi c activation temperature, the pigments change from a coloured to a transparent state. The experiments described in this paper presents some preliminary results from an investigation of the chromatic properties and color changing characteristics of thermochromatic inks alone, and in their combination with static inks.