Hewlett-packard Development Company, L.P.

Hp Scitex Ltd.

Kfir Dar

Eytan Cohen

Alex Trubnikov

Kobi Cohen

Efrat Soroker

Shimrit Rubin

Mazi Bar

An over-print varnish formulation is described. The formulation comprises a non-ionic polyurethane dispersion; a water-soluble polymer of Mless than 55,000; a wax having a particle size (d) 200 nm or less; and a water-soluble solvent, and at least 20 wt % solids, based on the total weight of the formulation. A method of printing using the formulation, and a printed article are also described.

Over-print varnish formulation

Herein is described a piezo-jettable varnish composition comprising a latex polymer having a weight averaged molecular weight Mw of greater than about 50 000, a polymeric salt derived from an acidic polymer having a weight averaged molecular weight Mw in the range of about 1000 to about 50 000, water, and a co-solvent, wherein, the latex polymer and polymeric salt are present in amounts such that the ratio of latex polymer to polymeric salt by weight is in the range of greater than about 1:1 to about 8:1.

Piezo-jettable varnish composition

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Netanya, Israel

Kfir Dar