Iron Oxide Pigments for Brick and Stone

Authentic Color for Modern Masonry

At Deqing Demi Pigment Technology Co., Ltd., we specialize in the "Colors of the Earth." Our brick and stone series is the result of years of research into historical and modern building materials. We provide the oxides that allow manufacturers to replicate the look of natural limestone, slate, or traditional red clay. Our commitment to purity ensures that our pigments never compromise the structural integrity of the masonry, providing a lifetime of beauty and performance.

Brick & Stone Usage Areas

• Fired Clay Bricks: Heat-stable colors added to the clay body before firing.
• Cast Stone: High-end architectural elements like sills, lintels, and columns.
• Veneer Stone: Realistic coloring for lightweight concrete stone cladding.
• Roofing Tiles: Permanent color for concrete and clay roof tiles.

Masonry Unit Technical Specs

Performance Attributes

• Kiln Stability: Specialized "Ceramic-Grade" oxides that don't shift during firing.
• Total Permanence: Inorganic structure is impervious to acids, alkalis, and UV.
• Natural Texture: Fine particles integrate without changing the stone's tactile feel.
• High Hiding Power: Provides deep color even in grey-cement based cast stone.

• Q: Can these pigments be used in high-heat kilns?

  A: Yes, we offer specific "Calcined" oxides that are stable at temperatures used in traditional brick firing.

• Q: Do they help with water resistance?

  A: While they are pigments, their fine particle size helps densify the concrete matrix, slightly improving water repellency.

Historical Replication Services

We offer "Historical Color Analysis," helping restoration projects match the exact pigment profile of antique bricks and stones for heritage sites.

Granulation Options: We can provide our pigments in a granulated form for brick manufacturers who use automated dosing systems to reduce dust and improve flow.

The Science of Mineral Integration

In brick and stone science, we focus on "Chemical Bonding." For cast stone, the pigment particles are held by the "C-S-H" (Calcium Silicate Hydrate) gel. We optimize our pigment's surface to ensure a strong physical bond with this gel. In fired bricks, we focus on the "Flux Interaction"—ensuring the pigment doesn't lower the melting point of the clay too much. This precision ensures that the finished masonry unit is not only beautiful but also maintains its original design strength and durability.