Folding carton inks

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Folding carton inks are designed for printing on paper board (or boxboard) substrates used in fast food carry out packages, pastry cartons, cereal boxes, mail containers, auto parts boxes, beverage carriers, milk and juice cartons, and other packages. Folding cartons are made from soHd bleached kraft or solid bleached sulfate (SBS), unbleached kraft, solid unbleached sulfate (SUS), clay coated unbleached kraft, recycled paperboard, and coated paperboard. 

A folding carton ink is composed of a hard non-film forming styrene acrylic emulsion vehicle and a styrene acrylic solution vehicle. As an alternative, a film forming styrene acrylic emulsion vehicle and rosin fumarate ester solution vehicle are used. 

A plasticizer (i.e. propylene glycol) and solvent (i.e. n-propyl alcohol) are added to folding carton ink to improve printability and insure coalescence at room temperature. 

All leaflets, though folded tightly for insertion, have inherent problems of ink show through , particularly with ink colour solid blocks, e.g. photos or pictures. Security bar code reading can be a severe problem on the thinner papers. The amount of copy required on all types of leaflets has increased dramatically over the past ten years, so much so that packs have had to be devised to accommodate very large leaflets (A3) this has created its own cartoning machine design problems. 

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