GCM 240 Chapter Notes - Chapter 15: Chester Carlson, Toner, Inkjet Printing
29 Nov 2016
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Document Summary
Non-impact printing (nip): processes where the inked image is transferred to the substrate without applying pressure, has no fixed image carrier (plate), and is based on a computer generated digital file. Nip inks consist of pigment/dye, binder, solvent (or water), and additives. Nip inks can be a powder, solid, or liquid (water-based, solvent-based, oil- based) The inkjet market is starting to use uv curable inks. Inkjet: ejecting drops of ink onto the substrate. Continuous inkjet: one drop right after the other (continuous: drop diameter is small 2 um, consists of a deflector that deflects unused droplets of ink into a gutter to be reused, used for industrial applications. Drop-on-demand: drops ink only on demand (no deflection: thermal inkjet (bubble jet): bubble droplets, heat source, nozzle, moving substrate, piezo inkjet: uses a quartz crystal that has electrical charges. Photographic process image is created by light exposure. A drum is coated with a photoconductive material. Entire drum surface is charged by corona.
