LONGKOU RENHE ULTRAMARINE CHEMICAL CO.,LTD.

Introduction

Longkou Renhe Ultramarine Chemical Co., Ltd. (龙口市仁和群青工贸有限公司) is a Chinese manufacturer of ultramarine pigments, an inorganic pigment class used to provide blue, violet, and color-correction effects in plastics, coatings, rubber, printing inks, and related materials. The company is based in Longkou Economic Development Zone, Shandong Province, near the Bohai Sea, and operates as a specialized pigment producer within China’s broader plastics-additives and colorants industry.

Renhe Ultramarine combines pigment production with product development and post-treatment capabilities. Its reported product range includes standard and higher-grade ultramarine pigments identified by grades such as 462, 465, 467, 468, 469, 470, 471, and 472. Company and exhibition profiles describe annual production capacity of approximately 8,000 tonnes, including about 5,000 tonnes of higher-grade products.

The company’s importance to plastics manufacturing derives from the role of ultramarine pigments in coloration, shade adjustment, and whitening or neutralization of unwanted yellow tones. Its products are relevant to processors of polyolefins, engineering plastics, masterbatch, coatings, rubber, and other materials in which pigment dispersion, thermal stability, chemical compatibility, and low heavy-metal content influence finished-product performance.

History and Development

Renhe Ultramarine developed as a dedicated ultramarine-pigment manufacturer in Longkou, a coastal industrial city in Shandong. Public company profiles describe the business as a manufacturer involved in the research, production, and sale of ultramarine pigments.

Several development milestones characterize the company’s reported growth:

• Establishment of a dedicated production base: The company developed a production site in Longkou Economic Development Zone covering approximately 28,000 square metres, with around 15,000 square metres of construction area.
• Expansion of product grades: Renhe broadened its portfolio beyond conventional grades to include higher-performance products such as 465, 467, 468, 469, 470, 471, and 472.
• Development of export-oriented and exhibition-based market access: The company has participated in international coatings and plastics exhibitions, including CHINACOAT, while also presenting its products through plastics-industry e-marketplace channels.

Company profiles report total assets or investment in the range of RMB60 million, although the precise financial basis and reporting period differ among published descriptions.

Business Operations and Segments

Renhe Ultramarine is primarily a manufacturer of inorganic color pigments rather than a diversified plastics processor or polymer producer. Its activities can be grouped into four operational areas:

• Ultramarine pigment manufacture
• Development of differentiated pigment grades
• Post-treatment and quality improvement
• Sales to domestic and international industrial customers

The company reports a workforce of more than 200 employees, including approximately 30 engineers, scientists, or technical personnel involved in product development and production technology.

Its location in Shandong provides access to China’s extensive chemical, plastics-processing, coatings, packaging, and export infrastructure. As a pigment supplier, the company occupies an upstream position in the plastics value chain: pigment products are incorporated by masterbatch producers, compounders, resin processors, coatings manufacturers, and other formulators before reaching consumer and industrial markets.

Products and Technologies

Ultramarine Pigments

Ultramarine is a complex sulfur-containing aluminosilicate pigment whose characteristic color results from chromophoric sulfur species within the mineral-like lattice. In industrial plastics applications, the material is valued for its vivid blue-to-violet shades, relatively low density, chemical resistance, and ability to counteract yellow undertones.

Renhe’s reported grades include:

The company describes certain higher-grade products as having tinting strength 10–15 percent above comparable overseas products. This is a company-reported performance claim rather than an independently standardized market comparison.

Processing and Performance Considerations

For plastics manufacturers, pigment performance depends on more than nominal color. Important technical factors include:

• Tinting strength: The quantity of pigment required to achieve a target shade.
• Dispersion: The ease with which pigment particles distribute through a polymer melt or carrier resin.
• Heat stability: Resistance to shade change during compounding, extrusion, injection molding, or other thermal processes.
• Chemical resistance: Compatibility with polymer additives, fillers, stabilizers, and processing conditions.
• Particle characteristics: Particle-size distribution and surface properties affect color development, dispersion, and processing behavior.
• Heavy-metal control: Low levels of regulated metals are relevant to packaging, consumer goods, toys, and other applications subject to chemical restrictions.

Ultramarine pigments are generally incorporated into plastics either directly during compounding or through color masterbatch. Masterbatch production can improve dosing accuracy, cleanliness, and dispersion consistency, especially in high-volume extrusion and injection-molding operations.

Equipment and Post-Treatment

Public company profiles refer to advanced post-treatment processes and environmentally oriented materials intended to reduce impurities and improve product quality. In an ultramarine-pigment plant, relevant process operations may include controlled reaction, calcination, milling, classification, surface or post-treatment, drying, and packaging. The available company descriptions do not provide a detailed equipment inventory, so specific furnace, milling, or classification models cannot be attributed to Renhe.

Applications and End Markets

Renhe’s pigments serve industries in which durable blue or violet coloration and shade correction are required.

Plastics and Masterbatch

Ultramarine pigments are used in:

• Polyethylene and polypropylene products
• Injection-molded household goods
• Packaging components
• Plastic films and sheets
• Pipes, profiles, and extruded products
• Consumer products and appliances
• Plastic masterbatch and color concentrates
• Selected engineering-plastics formulations

In plastics, ultramarine may be used as a primary colorant or in small quantities to neutralize yellow coloration in white, gray, and pastel products. Final suitability depends on the resin, processing temperature, additive package, exposure conditions, and regulatory requirements.

Coatings and Inks

The company’s products are also relevant to coatings and printing inks. In these applications, pigment fineness, dispersion stability, shade consistency, and resistance to chemicals or weathering are significant formulation considerations.

Rubber and Other Materials

Ultramarine is used in selected rubber, construction-material, detergent, stationery, and general industrial formulations. The exact application range varies by grade and by the technical specifications required by the customer.

Global Presence and Market Position

Renhe Ultramarine is situated within China’s large and export-oriented pigment-manufacturing sector. Its public profiles identify the company as a manufacturer based in Shandong and describe international-quality objectives for selected products.

The company’s market position is based primarily on:

• A dedicated ultramarine production base
• A product portfolio extending across standard and higher grades
• Reported annual capacity of approximately 8,000 tonnes
• Technical personnel focused on new-product development
• Participation in international coatings and plastics trade exhibitions
• Ability to supply pigment grades for multiple industrial sectors

The company’s reported capacity places it among the substantial specialized producers in the ultramarine segment, although no independently verified market-share figure is available in the cited company and exhibition materials. Competitive factors in this market include shade consistency, batch-to-batch reproducibility, pigment strength, dispersion behavior, regulatory compliance, delivery reliability, and price.

Renhe competes within a market that includes Chinese pigment manufacturers as well as established international suppliers. Customers may select suppliers according to local availability, technical support, qualification history, regulatory documentation, and the performance requirements of particular polymer or coating systems.

Research and Development

Research and development is an explicit part of Renhe’s operating model. The company reports approximately 30 engineers, scientists, or technical staff involved in new-product development and describes cooperation with domestic companies, universities, and research institutions.

Its development activities are associated with:

• Higher-tinting-strength grades
• Expanded shade and grade selection
• Improved dispersion and processing behavior
• Reduction of undesirable impurities
• Application-specific pigment performance
• Post-treatment and quality-control improvements

For plastics customers, such work is significant because colorants must perform consistently under changing resin formulations, processing temperatures, recycled-content levels, and regulatory constraints. Development of pigment grades that maintain color strength while minimizing dosage can also affect formulation cost and material efficiency.

Sustainability and Environmental Initiatives

Environmental considerations in ultramarine production include energy use, process emissions, wastewater, solid residues, dust control, and the management of trace metals and sulfur-containing materials. Renhe’s published company and exhibition descriptions emphasize environmentally oriented materials and post-treatment processes designed to maintain low levels of heavy metals such as lead.

This focus is relevant to plastics applications affected by restrictions on hazardous substances and by increasing customer requirements for chemical transparency. Low heavy-metal content can support use in consumer products, packaging-related applications, and other markets in which pigment purity is closely controlled.

Environmental performance also depends on operational factors that include:

• Control of particulate emissions during milling and handling
• Safe management of process residues
• Energy efficiency in thermal processing
• Wastewater treatment and reuse
• Accurate testing of regulated substances
• Documentation supporting customer compliance programs

The transition toward recycled plastics presents both opportunities and technical challenges. Recycled polymers can contain variable background colors, contaminants, and additive residues, increasing the importance of pigment strength, dispersion, and shade tolerance. At the same time, customers may require pigment suppliers to provide more detailed information on chemical composition and environmental performance.

Quality Management and Certifications

Quality requirements for ultramarine pigments typically include shade, tinting strength, moisture, particle-size characteristics, dispersibility, heat resistance, chemical resistance, and trace-metal content. Renhe’s public materials emphasize product quality and comparison with overseas products, while exhibition descriptions refer to post-treatment processes intended to reduce heavy-metal levels.

The company’s published profiles do not provide a complete, independently verifiable list of management-system certifications. Accordingly, its quality position is best assessed through the performance parameters and compliance documentation supplied for specific grades rather than through a generalized certification claim.

For industrial customers, qualification commonly involves:

• Sample approval and color matching
• Testing in the customer’s resin or coating system
• Batch consistency assessment
• Verification of restricted substances
• Packaging and storage evaluation
• Technical documentation and safety information

Innovations and Future Outlook

Renhe’s future development is connected to several structural trends in plastics and colorants:

• Higher-performance coloration: Processors increasingly require stronger tinting strength, reliable dispersion, and consistent color at lower dosage.
• Regulatory compliance: Restrictions on heavy metals and other substances increase the importance of analytical testing and traceable documentation.
• Growth of masterbatch and compounding: Centralized color preparation creates demand for pigments that disperse consistently in carrier resins.
• Recycled polymers: Variable feedstock color and composition may increase demand for effective shade correction and robust pigment performance.
• Product specialization: Application-specific grades can help pigment producers differentiate themselves from suppliers competing mainly on price.
• Supply-chain resilience: Customers may seek geographically diverse sources for pigments used in high-volume packaging, consumer goods, and industrial plastics.

The company’s reported production scale and portfolio of higher-grade products provide a platform for further specialization. Its principal strategic challenge is to maintain consistent quality and regulatory performance while controlling production costs in a competitive pigment market. Continued technical cooperation with downstream compounders, masterbatch producers, coatings formulators, and research institutions would support the development of grades tailored to changing polymer formulations and environmental requirements.

Summary

Longkou Renhe Ultramarine Chemical Co., Ltd. is a Shandong-based Chinese manufacturer specializing in ultramarine pigments for plastics, coatings, rubber, inks, and related industrial applications. Its operations include pigment manufacture, higher-grade product development, and post-treatment intended to improve performance and control impurities.

The company reports a production base of approximately 28,000 square metres, a workforce exceeding 200 employees, around 30 technical personnel, and annual ultramarine capacity of about 8,000 tonnes. Its product portfolio spans standard and specialized grades, including grades identified as 462, 465, 467, 468, 469, 470, 471, and 472.

Within the global plastics ecosystem, Renhe occupies a specialized upstream role as a supplier of inorganic colorants used by compounders, masterbatch producers, and plastics processors. Its longer-term competitiveness will depend on pigment consistency, technical support, environmental compliance, cost control, and the ability to meet the color and processing requirements created by recycled polymers, increasingly regulated products, and more technically demanding plastics applications.

References

• •

  CPS+ eMarketplace. (n.d.). LONGKOU RENHE ULTRAMARINE CHEMICAL CO.,LTD.LONGKOU RENHE ULTRAMARINE CHEMICAL CO.,LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1035260Link