What are the characteristics of temperature change ink

Temperature change ink known as thermochromic ink , showing temperature sensitive ink or ink . Temperature change ink into three categories: the display a specific color temperature , the color disappears upon heating becomes colorless glow in the dark immediately restore the original color , because reversible change process , referred to as " inversion variable message color ink " ; Show colorless at room temperature, after heating into another color , then restore the original cooling colorless , photoluminescent films the change process reversible , referred to as" inversion hair color ink " ; ink display color at room temperature , after heating into another color , because the reversible change process referred to as " inversion variable color ink transfer ".