It is Ink that changes color or its color disappears when exposed to water. There are two types of Hydrochromic Inks.
– Irreversible: Color changes or disappears when wet.
– Reversible: White to transparent when wet back to white when dry.
• White hides underlying image when dried, and image is revealed when wet
Principle of color change
Irreversible Hydrochromic Ink changes from color to color, or color to transparent when exposed to water. Reversible Hydrochromic Ink changes from White to transparent reversibly, and it gives a hiding effect on the background image when dry, and it reveals the underlying image when wet.