Hundreds or thousands of individually controlled elements in the thermal printhead are heated to melt pinpoint spots of color onto specially formulated paper or transparency film. This form of proofing has less color and detail accuracy than dye-sub proofing. Toyo Color Matching System is a proprietary system that supplies color swatches for designers and custom inks for printers, used to define and print specific colors. Trapping is the preparation of film separations so that adjoining colors overlap slightly to avoid gaps between colors in case of slight misregistration on press. Trapping is wet ink printed on top of wet ink in process-color printing.
Trapping is necessary because of what happens to paper on press.
Trim is to cut a signature to its finished size. TruMatch Color Matching System is a proprietary system that supplies color swatches for designers, based on process-color inks. TruMatch colors are organized according to hue, saturation, and brightness. Varnish is a transparent coating added to printed material to enhance color or improve durability. Velox is a Kodak brand name.