2 Active inks for printing, namely, active media containing pH sensitive ink pigments and temperature sensitive solvents; active inks for printing, namely, active media containing pH sensitive ink pigments; active inks for printing, namely, active media containing temperature sensitive solvents; dyes, colorants, pigments and inks; printing ink; developer powder for printers; ink for inkjet printers; printers' pastes (ink); ink [toner] for cartridges; ink cartridges, filled, for printers; varnishes for printing; coatings for printing; thermochromic printing inks; inks for printing; dyes, colorants, pigments inks and varnishes for printing on products, labels, films, transfers and belt systems, all for the purpose of monitoring the lifecycle of products, including lapsed time and changes in temperature