About Hongyi

Established in 2018, Zhejiang Hongyi Chemical Co., Ltd. is strategically located in the industrial zone of Longquan City, Zhejiang Province. Over the years, the company has made significant strides in its development, establishing a robust research and development center and two production bases. Hongyi has forged collaborative research partnerships with several renowned universities in China, contributing to the formulation of national standards.

As a national high-tech enterprise, Hongyi specializes in the research, development, manufacturing, and technical services of fluorescent brightening agents and optical whiteners.

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Annual Output

R&D Team

R&D Team

Our company owns a Ph.D. innovation station and has been recognized as a National High-Tech Enterprise, playing a pivotal role in drafting national standards.
Robust Production

Robust Production

We boast an annual production capacity of 5,000 tons of high-performance optical brighteners, catering to customized production in small batches and offering OEM services for international brands.
Quality Assurance

Quality Assurance

Employing full-process digital management, we adhere to a philosophy of "Quality Manufacturing." From raw material testing to production inspections and final product checks, we maintain standards that surpass national benchmarks.
Technical Support

Technical Support

We are staffed with a team of highly qualified application engineers who provide services and comprehensive guidance throughout the pre-sale, sale, and after-sale processes, delivering professional solutions tailored to our clients' needs.

2025-08-22 Consistent Quality Optical Brightener OB-1 For Whitening Applications
Fluorescent Whitening Agent has become a staple in modern manufacturing, address...
2025-08-15 Fluorescent Whitening Agent OB-1: High-Performance Brightening Solutions
From the crisp whiteness of plastic containers to the bright sheen of textile fa...
2025-08-08 Precision Fluorescent Whitening Agent Solutions Featuring OB-1
Advances in materials science continue to drive the demand for precise optical e...
2025-08-01 Optical Brightener For Ceiling Panels Guide
Optical brighteners, known for their capacity to enhance the visual appeal of po...
2025-07-25 Optimize Production Efficiency With Sheet And Profile Brighteners
The production of ceiling panels and PVC profiles increasingly relies on advance...
2025-07-18 Maintaining Consistent Color In PVC Profiles And Ceiling Applications
As expectations for consistent appearance and material performance in building p...

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Printing and dyeing whitening agent

laundry whitener

paper whitening agent

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As a national high-tech enterprise, Hongyi specializes in the research, development, manufacturing, and technical services of fluorescent brightening agents and optical whiteners.

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As a national high-tech enterprise, Hongyi specializes in the research, development, manufacturing, and technical services of fluorescent brightening agents and optical whiteners.