PEKING UNIVERSITY DELICHEM CORPORATION LIMITED（Trade Mark is Invisichrom for short） was found in 1994. The general manager is Dr. Ruigang Yao. Based on the powerful research from the College of Chemistry at Peking University(PKU), Invisichrom is a high-tech enterprise specializing in the production of quality anti-counterfeiting products.

Our corporation has produced a series of security & anti-counterfeiting pigments and printing inks, such as many kinds of fluorescent, infra-red powder, security printing inks and fibers(or security papers) that are sensitive to sun-light, UV, IR and temperature changing.

Also, we have been awarded the Class First Award by the Ministry of Education from the People's Republic of China, and the Golden Prize in the 5th International Exhibition of Packing Techniques.

Furthermore, our corporation has just developed a new, even more intelligent anti-counterfeit technique, which has raised the bar internationally and advanced the market.

Invisichrom has worked closely with the Government of the People's Republic of China, and has collaborated with the Department of General Logistics, as well as the Ministries of Public Security, Education and Customs Bureau, etc.

The Trademark Bureau of Chinese State Administration for Industry & Commerce has accredited the trademark of YAO′s head-portrait” to our company. Our chinese registration number for the trademark of Dr.YAO′s head-portrait ” is 3566795.

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