Fluid Inks

Processing of fluid inks, Flexo and gravure inks are easily processed because of their low viscosity. However, they are usually processed in closed containers because the solvent must be highly volatile to dry properly at the low temperatures used for drying on the gravure ot flexo process.Gravure Ink In the manufacture og gravure inks, certain resins are dissolved in solvents and milled with the pigment. The product is filtered, and the refineed ink is either discharged to storage or used immediately. Since volatile solvents and flammable resins, such as cellolose nitrate, and involved provison are made against fire hazard.Flexographic InksProcedures for manufacturing flexographic inks are similar to those for gravure inks. Flexographic inks, like gravure inks, can be produced from chips, which are dispersions og pigments in a dry resin. Since most of the work required to dispeerse the pigment was done in preparing the chips, only a high-speed mixer is required to make ink from chips.