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Demei focuses on the research, development, and production of inorganic iron oxide pigments. Our pigments cover iron oxide red, yellow, black, brown, green, orange, blue, etc.
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Product Details
Comprehensive information about our iron oxide pigments including specifications, applications, advantages, and more
Yellow Iron Oxide 313 for Construction
High-performance inorganic pigment with excellent color stability, weather resistance, and broad application range.
Brightening Global Infrastructure with Grade 313
Deqing Demi Pigment Technology Co., Ltd. is a premier manufacturer of the 313 yellow oxide series. We understand that in the building industry, color consistency is the hallmark of quality. Our 313 grade is synthesized under strictly controlled conditions to ensure that every batch provides the same high-chroma yellow. We provide the reliable mineral base that allows architects and contractors to create warm, inviting public spaces and durable residential developments.
Grade 313 Usage Areas
- Concrete Paving: Standard yellow for interlocking bricks and walkways.
- Decorative Mortar: Color-stable yellow for masonry joints and renders.
- Artificial Stone: Natural-looking yellow tones for cultured stone veneers.
- Roofing Tiles: UV-stable yellow for concrete and clay roof products.
Grade 313 Technical Specs
| Metric | Value | Standard |
| Iron Content (α-FeOOH) | Min 86% | ISO 1248 |
| Tinting Strength | 100% ± 3% | ISO 787-24 |
| Oil Absorption | 25 - 35 g/100g | ISO 787-5 |
| Sieve Residue (45$\mu$m) | Max 0.3% | ISO 787-7 |
| PH Value | 3.5 - 7.0 | ISO 787-9 |
Core Advantages
- Extreme Lightfastness: Rated 8 on the blue wool scale; will not fade in sun.
- Cement Compatibility: Fully resistant to the alkaline environment of concrete.
- High Hiding Power: Excellent opacity reduces the amount of pigment needed.
- Weatherproof: Withstands rain, snow, and temperature fluctuations without shift.
Q: Is 313 yellow safe for use in lime-based mortars?
A: Yes, it is chemically inert and perfectly stable in both Portland cement and lime systems.
Q: Why is my yellow concrete turning brown?
A: Grade 313 is stable up to 180∘C. If your process involves higher heat, the yellow may dehydrate into red oxide.
Construction Grade Services
We offer "Wet-Mix Color Matching," providing samples that account for the darkening effect of the wet cement paste on the final yellow shade.
Custom Blending: We can blend 313 with our red or black oxides to create custom "Buff," "Tan," or "Ochre" shades specifically for your project.
The Science of Acicular Morphologies
The intense color of Yellow 313 is due to its "Acicular" (needle-shaped) crystals. Unlike spherical red oxides, these needles have a high "Aspect Ratio." This scientific shape allows the particles to scatter light more efficiently in the yellow wavelength. In a concrete mix, these needles interlock with the cement hydration products, creating a more cohesive color network. This ensures that the yellow hue is not just a surface coating but a deeply integrated chromatic component of the material.
About Demei
Demei Chemical Co., Ltd. specializes in the research, development, and production of inorganic iron oxide pigments. With over a decade of experience in the field, we have established ourselves as a leading manufacturer with advanced production facilities and a dedicated R&D team.
We are China Custom Yellow Iron Oxide 313 for Construction Manufacturers and Wholesale Yellow Iron Oxide 313 for Construction Suppliers, Factory. Our comprehensive pigment range includes iron oxide red, yellow, black, brown, green, orange, and blue. We produce high-performance and high-stability composite iron oxide pigments with three specialized series: Standard, Micronized, and Low Heavy Metal Content levels.
Our products are exported to more than 30 countries and regions worldwide, serving diverse industries including construction, coatings, plastics, rubber, ceramics, and paper. We pride ourselves on consistent quality, excellent color properties, and reliable technical support for our global clients.
R&D Excellence
Continuous investment in research and development ensures technological leadership. Our R&D center focuses on innovative pigment formulations and application technologies.
Advanced Manufacturing
State-of-the-art production facilities with automated control systems ensure consistent quality and large-scale production capacity of over 50,000 tons annually.
Quality Assurance
Strict quality control at every production stage. Certified to ISO 9001:2015, our pigments meet international standards for color consistency and performance.
Global Reach
Extensive distribution network across Asia, Europe, Americas, and Africa. We provide customized solutions and technical support for diverse market requirements.
Core Products
We provide a full range of high-quality inorganic iron oxide pigments, widely used in building materials, coatings, plastics, rubber, ceramics and other industries.
Product Series
We offer three specialized series of iron oxide pigments to meet diverse industry requirements and application scenarios
Standard Series
Conventional particle size iron oxide pigments suitable for most industrial applications. Excellent dispersibility and tinting strength with high cost-performance ratio.
Micronized Series
Ultra-fine particle size with uniform distribution. Ideal for high-end coatings, plastics, and applications requiring superior fineness and smooth finish.
Low Heavy Metal Series
Strictly controlled heavy metal content meeting international environmental standards. Suitable for toys, food packaging, and safety-sensitive applications.
Social Responsibility
Demei not only contributes to production and operation, but also faithfully fulfills its social responsibilities, protects the ecological environment, strengthens safe production, and cares for the health of employees.
Environmental Protection
Implementing green production processes, reducing waste emissions, and actively promoting circular economy principles.
Safe Production
Comprehensive safety management system ensuring controlled and secure operations throughout the production process.
Employee Health
Providing healthy working environments, regular health check-ups, and focusing on physical and mental well-being of our employees.
Community Contribution
Active participation in community development, supporting educational initiatives, and giving back to society.
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Phone
86-572-8035379
86-13666526593 -
Hours
Monday-Friday: 9am to 6pm
Saturday, Sunday: Closed -
Address
20th Floor, Mibei Chuanggongchang No. 650 Yunxiu South Road, Deqing County, Huzhou City, Zhejiang Province, China(Sales Office)
