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D‐D reaction paints and varnishes. The term ‘D‐D’ is an abbreviation used for materials that have a base of Desmophen (polyester) and Desmodur (di‐isocyanate). The use of D‐D paints and varnishes produces a film which has remarkable properties of resistance to physical and chemical action. The article deals with the limits and possibilities of the application of these materials and is based on the results of many years of laboratory research, as well as practical experience.