What is the technique? Thermochromic inks can change from colourless to colourful or colourful to colourless very quickly. Although thermochromic inks were introduced in the…
Ummi Kaltsum
SG. ADM PRODUCT DESIGN.
What is the technique? Thermochromic inks can change from colourless to colourful or colourful to colourless very quickly. Although thermochromic inks were introduced in the…