Brown Pigments for Kiln Stable Applications

Leading Supplier for Fired Brown Ceramics

Deqing Demi Pigment Technology Co., Ltd. provides high-purity, kiln-ready browns for the global ceramics and brick industries. We understand that "color burnout" is a major risk in firing; therefore, we specialize in calcined browns that offer a wide "Firing Window." Our pigments are the choice for luxury tile manufacturers and structural brick makers who demand color uniformity across massive production runs in high-temperature tunnel kilns.

Kiln-Stable Application Fields

• Face Bricks: Permanent brown coloring for architectural masonry.
• Ceramic Roof Tiles: Weatherproof and fireproof "Terracotta" browns.
• Porcelain Bodies: Integral coloring for full-body vitrified tiles.
• Refractory Castables: High-heat identification colors for industrial linings.

Kiln-Stable Brown Specs

Attributes for Firing Environments

• Absolute Stability: Hue does not shift even under prolonged "Soak Times" in the kiln.
• Glaze Neutrality: Does not cause pinholing or blistering in standard glazes.
• Natural Appearance: Creates earthy tones that perfectly mimic natural stone and clay.
• High Bulk Density: Facilitates easy handling and dust-free dosing in brick plants.

• Q: Will the brown turn black in a reducing atmosphere?

  A: Our kiln-stable browns are engineered to maintain their oxidation state, though they are best suited for neutral or oxidizing kiln environments.

• Q: Is it suitable for "Third-Fire" decorations?

  A: Yes, its fine particle size makes it ideal for screen printing and decals applied on fired glazes.

Structural Clay Color Design

We provide "Body-Stain" optimization, helping brick manufacturers achieve specific "Old World" brown aesthetics by blending our pigments with their local clay chemistry.

Uniformity Guarantee: We offer "Batch-Retention" samples for up to 2 years, ensuring that long-term architectural projects can order the exact same brown shade for project expansions.

The Science of Iron-Manganese Synergy

In kiln-stable browns, color science revolves around the "Fe-Mn-O" phase diagram. By controlling the ratio of Iron to Manganese during calcination, we can create a range of stable brown hematites. We use XRD (X-Ray Diffraction) to verify that no "free" iron remains that could cause spotting. We monitor the "Mass-tone" saturation to ensure that even after the ceramic body shrinks during firing, the brown remains deep and uniform.