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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
Black Iron Oxide 318 for Construction
High-performance inorganic pigment with excellent color stability, weather resistance, and broad application range.
Building a Bolder Future with Grade 318
Deqing Demi Pigment Technology Co., Ltd. is the leading provider of high-grade 318 black oxide. We understand that in construction, consistency between batches is non-negotiable. Our 318 series is manufactured to the tightest tolerances, ensuring that a project started in January looks identical to the work finished in July. We provide the "Reliable Black" that architects and contractors trust for the world's most prominent infrastructure and residential projects.
Grade 318 Usage Areas
- Colored Pavers: Mass-coloration for high-durability pedestrian walkways.
- Architectural Precast: Uniform black facades and structural elements.
- Roofing Tiles: Deep black coloring for concrete and clay tiles.
- Concrete Masonry Units: Consistent color for bricks, blocks, and retaining walls.
Grade 318 Technical Specs
| Metric | Value | Standard |
| Tinting Strength | 100% ± 2% | ISO 787-24 |
| Sieve Residue (45$\mu$m) | Max 0.3% | ISO 787-7 |
| Water Soluble Matter | Max 0.5% | ISO 787-3 |
| PH Value | 5.0 - 8.0 | ISO 787-9 |
| Iron Content | Min 90% | ISO 1248 |
Performance Features
- Alkali Stability: 100% resistant to the high PH of fresh concrete.
- Efflorescence Resistant: Low salt content reduces the risk of white staining.
- Rapid Wetting: Disperses in seconds within the concrete mixer.
- UV Permanent: Will not fade or wash out even in high-traffic outdoor areas.
Q: Why is 318 the preferred grade for pavers?
A: Grade 318 offers the best balance of tinting strength and price, providing the deepest black for the lowest cost per unit.
Q: Can it be used in white cement?
A: Yes, using 318 in white cement allows you to achieve clean, vibrant "Cool Grey" tones.
Construction Optimization Services
We provide "Dosage Charts" based on different cement types to help you achieve the exact shade of black or grey your client requires.
Site-Ready Packaging: We offer 25kg water-soluble bags that can be added directly to the mixer to ensure accurate dosing and zero cleanup waste.
The Science of Cement Paste Absorption
In grade 318, we focus on "Specific Surface Area" (BET). To color concrete effectively, the pigment doesn't color the sand or stone; it colors the cement paste that coats them. We mill 318 to an optimal surface area that ensures the maximum number of pigment particles are available to coat the cement grains. This scientific approach ensures that you get the most "Color Coverage" per kg of pigment, resulting in a more intense and uniform black finish throughout the entire concrete mix.
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 Black Iron Oxide 318 for Construction Manufacturers and Wholesale Black Iron Oxide 318 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)
