Pigment Red
"Pigment Red" refers to a group of red pigments used in various industries, including the manufacturing of paints, inks, plastics, and textiles. These pigments are part of the broader category of organic and inorganic colorants that impart color to different materials. Each pigment has a unique chemical composition and physical properties.
The term "Pigment Red" is often followed by a specific index number assigned by the Colour Index International (CII), an international reference database of colorants.
Pigment Red pigments can be derived from both organic and inorganic sources. Organic red pigments are often carbon-based compounds, while inorganic red pigments may include metal oxides or other mineral-based compounds. The choice of pigment depends on the application requirements, such as stability, lightfastness, chemical resistance, and color intensity.
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Brief introduction of inorganic red pigment
The inorganic red pigments commonly used in coatings are Iron Oxide red, cadmium red and molybdenum chromium red.
1. Iron oxide red
The color ranges from orange red to purplish red. It has good optical rotation resistance, high temperature resistance, dirt gas resistance, alkali resistance, good coloring power, strong covering power and low price. It can be used in all kinds of antirust primer and topcoat. Its disadvantage is that it is not resistant to strong ACID, and the color is black and not bright enough.
Due to the different manufacturing methods of iron oxide red, the particle size and shape are also different, so the color of iron red is changed from red yellow to red purple, so it is necessary to select different colors of iron oxide red according to different requirements of coatings.
When the particles of iron oxide red are ground to less than or equal to 0.01 μ m, the covering power of the pigment in organic medium decreases significantly. This pigment is called transparent iron oxide. It can be used to make transparent paint or metal flash paint, and has better color retention than using organic dyes.
2. Cadmium red
Cadmium red is a mixture of cadmium sulfide and solarization cadmium (3CDs · 2cdse). Generally, sulfide accounts for 55% and suntanned substance accounts for 45%.
Chemical name: cadmium red
Chemical composition: Selenium cadmium sulfide
Pigment index (structure) No.: pigment red 108 (77202)
CAS No.: 12214-12-9
Appearance: red powder
Crystal form: hexagonal, cubic
The color of cadmium red pigment is very full and bright. It has good temperature resistance, alkali resistance, light resistance and atmospheric influence resistance. It has good coloring power and covering power. The chromatographic range is from yellow red to purple sauce. The higher the content of CdSe in cadmium red, the stronger the red light and the darker the color. Cadmium red can be used in high temperature resistant coatings, and also widely used in enamel, ceramics, glass, coatings, plastics, art pigments, printing ink, paper, leather, colored sand and stone building materials and electronic materials.
3. Molybdenum chrome red
Molybdenum chrome red is the mixed crystal of lead molybdate and lead chromate, which is bright red and orange when containing lead chromate. It has strong optical rotation resistance, good covering power and coloring power.
The weathering resistance of molybdenum chrome red without surface treatment is general, but the molybdenum chromium red after coating or pre darkening has good weather resistance and color retention, which is widely used in various kinds of construction machinery topcoat.
Features of Inorganic Red pigment
Inorganic red pigments are chemical compounds that are used to impart a red color to various materials, such as paints, plastics, ceramics, and textiles.
Chemical Composition
Inorganic red pigments are often composed of metal oxides, sulfides, or salts. Common metallic elements include iron, cadmium, chromium, and lead.
01
Color Stability
Inorganic red pigments are known for their color stability, meaning they are less prone to fading or discoloration over time, especially when exposed to light, heat, or other environmental factors.
02
Opacity
Many inorganic red pigments are opaque, providing good coverage and hiding power. This makes them suitable for applications where a solid and uniform color is desired.
03
Heat Resistance
Inorganic red pigments generally exhibit high heat resistance, making them suitable for use in products that undergo high-temperature processing, such as ceramics and automotive coatings.
04
Chemical Resistance
Inorganic red pigments often display resistance to chemicals, which contributes to their durability in various applications. This resistance is important, for example, in coatings that may come into contact with solvents or corrosive substances.
05
FAQ
Q: What is pigment red 170 used for?
Q: What is the color code for red 170?
Q: What is pigment red 122?
Q: What is the formula for pigment red 122?
Q: What is pigment red 112 used for?
Q: What is the CAS number of PR 122?
Q: What number is Alizarin crimson pigment?
Q: What is the composition of red pigments?
Q: What is the color code for red 254?
Q: What is the heat resistance of pigment red 254?
Q: What is the CAS number of pigment red 254?
Q: What pigment number is Napthol red?
Q: What is the color code for real red?
Q: What are the RGB color codes for red?
Q: Is PR254 lightfast?
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