Irreversible washable hydrochromic inks for printing

Irreversible washable hydrochromic inks are inks which can be permanently removed (washed off) by using water.

Inks treated with water may be practically completely, irreversibly removed from the print. They can serve an informative or advertising mean.

After removing (washing off) the ink from the print, an information hidden underneath the washable ink is revealed.

Irreversible washable hydrochromic inks can also be used for protecting cheques as well as promotional or lunch vouchers from copying..

Each attempt at intervention to a printed surface by using water is immediately visible as a blurred or removed underprint.