Reprographics Applications of Dyes and Pigments

Organic colorants of various types are key components in the operation of photocopiers and laser printers. The photoconducting drum contains two surface layers. The first is a thin charge-generating 

Inkjet printing requires the use of inks that meet stringent physical, chemical and environmental criteria. Inkjet inks are very low viscosity fluids as is required by the non-impact method of ink delivery. They have a relatively simple composition, consisting of a solvent, almost invariably water, and a colorant together with other additives for specific purposes, for example water-miscible organic solvents in aqueous inks to assist dye solubility and to minimise crystallisation as ink dries at the nozzle, viscosity modifiers and surfactants for control of surface tension. When first introduced, the colorants used were 

4 BIOMEDICAL APPLICATIONS OF DYES 11.4.1 Biological Stains and Probes 

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