Erasable indian ink - which contains interference factor, e.g. binder-immiscible plasticiser, in addn. to pigment solvent and binder

摘要

In addn. to pigment, solvent for binder and standard binder, Indian ink also contains an interference factor, (I) against the bonding strength of binder to paper. (I) may be a plasticiser which is immiscible or only partly miscible with the binder, a plant oil or a phthalate ester. The addn of (I) allows mechanical removal, e.g. erasure, of Indian ink off foils or paper having a sealed or silicone layer-impregnated surface.