About Us

Xiangtan Hongda Dampproof Preservation Technology Development Co., Ltd. founded in 2013, who has been a senior technology from adsorbents industrial field in China. It’s great honor to press our greetings and best wishes for you here.
Hongda is a manufacture specialized in deoxygenation, dust and humidity protection, absorbent, desiccant for many years, the adsorbents are more safely than traditional preservatives and additives. Hongda has established an improved system with research, raw materials processed, production, marketing sales and services along with years development, and the quality certification system got ISO 9001 approval . All the products from Hongda has pass though the national tests and third-party tests and gained the certificate of qualification like Toxicological test report, SGS test report, National inspection report etc.


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Oxygen and moisture are the most abundant element in the universe, and an important part of the atmosphere necessary for the survival of most terrestrial life. And also they are the surviving conditions for some types of bacteria and fungi, and will lead oils from becoming rancid.

An oxygen absorber is a small sachet used to keep products safe from things like mold and extend shelf life by taking the oxygen out of a sealed package and bringing the oxygen level down reliably to 0.01% or less.

Desiccants serve to eliminate humidity from the air and they adsorb moisture, thereby creating and sustaining a dry, moisture-free environment.


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