In this book the authors go back to basics to describe thestructural differences between dyes and pigments, their mechanisms of action,properties and applications. They set the scene by explaining the reasonsbehind these differences and show how dyes are predominately organic compoundsthat dissolve or react with substrates, whereas pigments are (predominantly)finely ground inorganic substances that are insoluble and therefore have adifferent mode of coloring. They also describe the role of functional groupsand their effect on dyeing ability, contrasting this with the way in whichpigments cause surface reflection (or light absorption) depending on theirchemical and crystalline structure and relative particle size. The bookexplores the environmental impact of dyes in a section that covers thephysical, chemical, toxicological, and ecological properties of dyes and howthese are used to assess their effect on the environment and to estimatewhether a given product presents a potential hazard. Lastly, it assesses how,in addition to their traditional uses in the textile, leather, paper, paint andvarnish industries, dyes and pigments are indispensable in other fields such asmicroelectronics, medical diagnostics, and in information recording techniques.
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