Inks whose color varies according to temperature, are distinguished the reversible and the irreversible.
Reversible:
The color disappears above the turning temperature and returns below (+/- -20 ° C to +/- + 80 ° C). Also available in thermochromic liquid crystal with variation red, green, blue (3 turning temperatures) (very fragile) in printing on black background.
Ink of low opacity and non-solid light (maximum 1 year with protection), is available in all the ranges of inks (after compatibility tests). Screen printing, flexo.
Irreversible:
The ink irreversibly colors above the turning temperature (+/- + 50 ° C to
+/- + 160 ° C), limited colors.
Available in ink ranges with water. Screen printing, flexo.
Sterilization:
These inks change color irreversibly during the process (steam, temperature, autoclave, gamma ray, ethylene oxide, etc.) Range of inks with 2 different colors before and after the sterilization process either steam, autoclave, EO, gamma ray … Available in ink ranges with water and solvent. Screen printing, flexo.