They constitute the “raw material” Filmógena of an ink in which the pigments (coloring matter) are dispersed. The binders ensure the transfer of the ink from the inkwell of the machine to the support or subsequent to the printing, the formation of the film and its adhesion to the support. The binders of offset inks are manufactured starting from: drying oils and / or polyester resins, glycerophthalics modified with the same oils (alchemical resins) – solutions or dispersions of synthetic hard resins in mineral oils – combinations of the two types.