Thermochromic Ink Reversible – Cold security ink is used in advertising, safety warning, quality control, product labelling and security printing works. This ink is also used as important element during production of anti-counterfeit ink. Color of this ink tends to change at up to 5 degree C temperature. Thermochromic Ink Reversible – Cold is composed of color developers, color formers and melt materials. These elements are blended together and are microencapsulated with impermeable polymeric wall. Long storage life, accurate formulation and reasonable price are the key aspects of this ink.