Colorless digital primer for digital printing

A colorless digital primer, comprising:

• a colorless paste, including:
• a non-polar carrier fluid;
• and
• a resin swollen in the non-polar carrier fluid, the resin present in the paste in an amount ranging from about 20% (w/w) to about 50% (w/w);
• and
• a solid polar compound dispersed in the resin, the solid polar compound being selected from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof, and the solid polar compound being present in an amount up to 60 wt. % of solids in the colorless paste.

A method of making a colorless digital primer, comprising:

• selecting a solid polar compound from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof;
• adding the solid polar compound to a colorless paste including a non-polar carrier fluid and a resin;
• and
• grinding the solid polar compound and the colorless paste to disperse the solid polar compound in the resin of the colorless paste.