Iron Oxide Brown

Iron Oxide Brown from a Dedicated Pigment Manufacturer

Deqing Demi Pigment Technology Co., Ltd. is a professional Iron Oxide Brown manufacturer and supplier based in China. We focus on the research, development, and production of inorganic iron oxide pigments, offering a full spectrum that includes red, yellow, black, brown, green, orange, and blue. Our brown series is engineered for high performance and stability, available in three distinct levels: standard, micronized, and low heavy metal content, to meet diverse industrial requirements.

Our brown iron oxide pigments are synthetic, composed primarily of Fe₂O₃ and Fe₃O₄, ensuring consistent chemical purity and batch-to-batch uniformity. They deliver strong tinting strength, excellent lightfastness, and resistance to alkali, making them suitable for demanding applications in construction, coatings, ceramics, rubber, and plastics. We support global buyers with tailored solutions, backed by our manufacturing expertise and commitment to environmental responsibility.

Product Range and Application Fit

Our Iron Oxide Brown range includes several grades, each designed for specific color targets and performance requirements. The table below outlines the primary grades we supply and their typical applications.

For applications requiring finer particle size, our micronized series offers improved dispersion and gloss, ideal for wood coatings and high-end finishes. The low heavy metal series meets stringent regulatory requirements for toys, food contact, and environmentally sensitive uses.

Technical Specifications and Quality Assurance

Each batch of Iron Oxide Brown is produced under strict quality control, ensuring consistent performance. Typical specifications for our grades include:

• Fe₂O₃ content: ≥88%
• Oil absorption: 15–35 g/100g depending on grade
• Sieve residue (325 mesh): ≤0.3%
• Water-soluble salts: ≤0.5%
• Moisture: ≤1.0%
• pH value: 4–7
• Lightfastness: Grade 7–8 (ISO 105-B02)

Our pigments comply with ISO 10601, DIN 55913, REACH, and RoHS. We are a Iron Oxide Brown supplier that prioritizes quality, with each lot tested for tinting strength and color difference (ΔE) to ensure uniformity.

Process and Application Considerations

When selecting a brown iron oxide for your process, consider the following:

• Concrete and cement: Our pigments are alkali-resistant and do not react with cement, ensuring stable color in pavers, blocks, and precast products.
• Coatings and paints: With low oil absorption and easy dispersion, they are suitable for water-based and solvent-based systems, providing UV stability for exterior use.
• Plastics and rubber: The pigments disperse uniformly in PVC, PE, and rubber compounds, maintaining color consistency in flooring and profiles.
• Ceramics: Stable at high firing temperatures, ideal for glazes and body colorants.

For optimal results, we recommend pre-blending the pigment with fine aggregates in concrete applications and using appropriate dispersants in liquid systems. Our technical team can provide guidance based on your specific formulation.

Packaging, Storage, and Handling

We package Iron Oxide Brown in 25 kg paper bags with plastic liners, water-soluble bags, low-melting PE bags, or 500–1250 kg jumbo bags, depending on your handling and environmental requirements. Proper storage is essential: keep the powder in a dry, ventilated area away from moisture and direct sunlight. Once opened, reseal the packaging promptly to prevent caking.

Information We Use to Configure Your Solution

To prepare a precise quotation and product recommendation, we need the following details from your side:

• Application: Concrete, coatings, plastics, ceramics, or other.
• Target color: Reference to a standard shade or a specific grade like 610 or 686.
• Processing conditions: Mixing equipment, temperature, and dispersion method.
• Regulatory requirements: Any need for low heavy metals, food contact compliance, or specific standards.
• Annual volume: Estimated consumption to optimize packaging and logistics.

With this information, we can match you with the right series—standard, micronized, or low heavy metal—and provide samples for evaluation.

Frequently Asked Questions

Q1: What causes color variation when using Iron Oxide Brown in concrete?

Color inconsistency typically results from fluctuations in dosage or uneven dispersion. We recommend pre-blending the pigment with fine aggregates before adding water and maintaining a consistent water-cement ratio. Cross-check each batch against a standard color tile to ensure uniformity.

Q2: How can flocculation of Brown Oxide Pigment in water-based coatings be addressed?

Flocculation often occurs when dispersion is not optimized. Adding a suitable dispersant (e.g., polyacrylate-based), grinding to a fineness of ≤10 μm, and adjusting pH to 7–9 can improve stability. Using a high-speed disperser during pre-dispersion is also effective.

Q3: How does Iron Oxide Brown 686 differ from other grades?

Iron Oxide Brown 686 has a warm reddish-brown hue, ideal for antique brick and terracotta tones. Other grades like 610 are more yellow-brown, suitable for wood imitation or earthy palettes. Grade selection depends on your target color and substrate.

Q4: What are the storage requirements for Brown Oxide Powder?

Store in a dry, well-ventilated warehouse away from direct sunlight and moisture. Avoid co-storage with acids or oxidizing substances. Once opened, reseal promptly to prevent moisture absorption and caking.

Q5: Is Brown Oxide Pigment safe for food-contact applications?

Certain grades comply with food-contact regulations like FDA 21 CFR and EU Regulation (EC) No 10/2011. Compliance depends on the specific grade and application. Contact us for documentation and guidance on regulated uses.