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What is inorganic pigment?

What is Inorganic Pigment?

Inorganic pigments are a type of colored powder made from inorganic substances, used for staining or coloring objects. In contrast to organic pigments, inorganic pigments typically contain metal elements or their compounds, such as metal oxides, metal carbonates, metal sulfides, and so on.

Key Characteristics of Inorganic Pigments

Inorganic pigments exhibit significant features such as high opacity, excellent lightfastness, heat resistance, and resistance to color migration. Despite their numerous advantages, they have some limitations, including high density leading to significant refractive indices and large particle sizes, resulting in lower color brightness and vividness.

inorganic pigment

Current Industry Status

In the rapidly evolving industries of construction materials, coatings, paints, plastics, and inks, there is a growing demand for inorganic pigments. Notably, titanium dioxide and iron oxide play crucial roles in this field.

Environmental Considerations

Recognizing the importance of environmental sustainability, there is widespread acknowledgment within the industry for enhancing the environmental safety of inorganic pigments. The development trend is shifting towards lead-free inorganic pigments to align with eco-friendly practices.

inorganic pigments

Classification of Inorganic Pigments

Inorganic pigments can be classified based on production methods, functionality, structure, and color.

Classification by Production Method:

  • Natural Inorganic Pigments (e.g., cinnabar, malachite, mineral pigments)
  • Synthetic Pigments (e.g., Titanium dioxide, iron oxide pigment)

Classification by Functionality:

  • Coloring Pigments
  • Anti-corrosion Pigments
  • Filler Pigments
  • Special Pigments (e.g., high-temperature pigments, pearlescent pigments)

Classification by Chemical Structure:

  • Iron Series
  • Chromium Series
  • Lead Series
  • Zinc Series
  • Metallic Series
  • Phosphate Series
  • Molybdate Series
  • Borate Series

Classification by Color:

  • White Pigments (e.g., titanium dioxide, zinc barium white, zinc oxide)
  • Black Pigments (e.g., carbon black, iron oxide black)
  • Yellow Pigments (e.g., chrome yellow, iron oxide yellow, cadmium yellow, titanium yellow)
  • Red Pigments (e.g., iron oxide red, molybdenum chrome red, cadmium red)
  • Green Pigments (e.g., chromium oxide green, lead chrome green)
  • Blue Pigments (e.g., iron blue, ultramarine blue, cobalt blue)

This comprehensive analysis explores the concept of inorganic pigments, highlighting their characteristics, classifications, and the current state of the industry. Inorganic pigments play a crucial role across various sectors, with a growing emphasis on environmental sustainability and high performance.

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