Лако-красочные материалы — производство

The industrial synthesis of inorganic pigments is strictly controlled by qualitative and quantitative chemical analysis in modern, well-equipped physicochemical test laboratories. Quantitative chemical and X-ray analysis is carried out on raw mate­rials, intermediates, and substances used for aftertreatment, but most importantly on the final products, byproducts, and waste products (wastewater and exhaust gas). This serves to fulfill not only quality requirements but also the demands of environ­mental protection. Quality control, carried out in specially equipped laboratories, in­cludes testing of physical and technical application properties [1.7, 1.8]. Information on quality requirements for inorganic pigments is widely available in international (ISO), European (EN), and national standards (e. g., AFNOR, ASTM, BSI, DIN) [1.9, 1.10]. Standard analytical methods and conditions of delivery for the most impor­tant inorganic pigments are given in Table 1.1. Further information is given in later sections.

Tab. 1.4: Classification of inorganic colored pigments. Chemical class Green Blue-green Blue Violet Red Orange Yellow Brown Oxides and oxide-hydroxides Iron oxide pigments iron oxide red iron oxide orange iron oxide yellow iron oxidt brown Chromium oxide pigments chromium oxide chromium oxide hydrate green Mixed metal oxide pigments cobalt green and blue chromium rutile orange nickel rutile yellow, chromium rutile yellow zinc iron spinel, Mn-Fe brown Sulfide and sulfoselenide pigments cadmium sulfose­ lenide cerium sulfide cadmium sulfide, (Cd, Zn)S Chromate pigments chrome green molybdate red chrome orange chrome yellow, zinc yellow Ultramarine pigments ultramarine green, blue, violet, and red Iron blue pigments iron blue Others manganese blue cobalt manganese violet (Ca, La)Ta(0,N)3 naples yellow, bismuth vanadate

1.2.1.3