printing_inks_druckverfahren

Printing Inks

Julia BĂśrmann

Printing Inks Printing inks are principally made up of: colorants – (pigments which are organically or inorganically colored, white or black substances that are insoluble in the ink vehicle) – (dyes which are organic compounds that are dissolved in the system during application) vehicles/binders (are normally resins dissolved in mineral oil) additives (the type of additive is dependent on the respective printing process; additives are added to the ink in particular to influence drying, flow behavior, and abrasion resistance.) solvents

Printing Inks

Julia Bรถrmann

Ink drying The ink is to harden on the substrate immediately after printing in order to prevent smudging or other impairments of the print image during sheet travel in the press and during the finishing.

Ink dries on different ways: Physical drying (absorption) Chemical, oxidative drying (reaction with oxygen) Combined drying Chemical drying through high energy radiation (UV= ultra violet light) Modern printing inks generally use a combination of these drying methods to ensure good and rapid ink drying on the printing substrate.