Iron oxide red with natural and artificial two. Natural said tomatoes, is basically pureiron oxide, red powder. The production method and the different operating conditions,the crystal structure and physical properties of them are very different, the colorchanges to orange light blue to violet between, covering power and tinting strength is very big, the density of 5-5.25. Has excellent light resistance, high temperatureresistant properties, and atmospheric effects, resistance, resistance to all alkali foul gas. Heating in concentrated acid only circumstances will gradually dissolve.
Color identification method of iron oxide red:
The first category: visual method
Chinese has yet to develop national standards. Foreign standards ASTMD1535-95a,using the Munsell color label to represent the pigment color. Method does not providethe sample slurry preparation method, refer to ASTM standards of other pulping aftertest.
Second class: instrument test method
The use of the instrument directly measured pigment color value. Apparatus in accordance with this kind of method of color measurement instrument, color meter,colorimeter etc..
Determination of pigment color (dry powder and paste), cake and preparation of membrane way see section fourth of the two - white degree.
At present, iron oxide red mainly is divided into two kinds, one kind is the colorcomparison method, namely with the reference sample or instrument test results are given visual comparison; another kind is the direct method of the color measurement,or like number that the use of instruments or visual directly gives the amount of color.Mainly according to the testing method can know iron oxide red color values are consistent with the formulation of national standards for production of culture,provides important reference basis for the purchase of the iron oxide red or determine the quality level of iron oxide red.
Use:
Red iron oxide in the building materials industry is mainly used in cement color, color cement brick, colored cement tile, glazed tile, floor tile, imitation of concrete mortar,color color asphalt, terrazzo, mosaic tiles, artificial marble and stucco walls; in thepaint industry in the main to be used to manufacture all kinds of paint, paint, ink. In other industries, such as ceramics, rubber, plastics, leather wipe light paste used ascoloring agents and fillers. Widely used in building, rubber, plastic, paint and other industries, especially iron red primer with antirust function, can replace the expensivered lead paint, saving non-ferrous metals.
