Flexible printed material

A flexible printed material, comprising:

• a flexible substrate;
• a primer layer disposed on the flexible substrate;
• an electrostatic ink composition printed on the primer layer;
• and
• an overprint varnish composition on the printed electrostatic ink composition, wherein the curable overprint varnish composition is formed from an ethylenically unsaturated monomer, an ethylenically unsaturated oligomer, or mixtures thereof, and less than 10 wt. % of a cross-linking additive based on the total weight of the curable overprint varnish composition.

A flexible package, comprising a flexible printed material comprising:

• a flexible substrate;
• a primer layer disposed on the flexible substrate;
• an electrostatic ink composition electrostatically printed on the primer layer;
• and
• an overprint varnish composition on the printed electrostatic ink composition, wherein the overprint varnish composition is formed from an ethylenically unsaturated monomer, an ethylenically unsaturated oligomer, or mixtures thereof, and less than 10 wt. % of a cross-linking additive based on the total weight of the curable overprint varnish composition.