Security Ink for Color Change with Different Temperatures

Reversible heat sensitive printing inks.

 Effect:Turning colorless in appearance after being heated and it can restore its original color after being cooled.

1)Temperature: 7°C-13°C, 26°C-31°C, 38°C- 43°C, 46°C-51°C, 60°C-65°C.

2)Colors: middle yellow-none,  gold red-none,   bright red-none,   rose red-none,  peach red-none,   royal blue-none,

 verdancy-none,  peacock green-none,   blackish green-none,  dark brown- -none  and  black-none

Below is the effect pictures.



   After heating it ,the black color will disappear,the flowers then can be seen,after cool can return to black again.