Gemonog Chemical Laboratory is a generic defaced monology corporation, established in 1911 AD, headquartered in Los Angeles, California, USA, specialized in the study of SCDN -- better known as security coated defaced notes, and SSD chemical solutions researching, manufacturing, distribution and supply. GCL is the world's leading manufacturer and supplier of SSD chemical, HU2 powder, UNICO mercury, LASER machine and DFX banknotes cleaning services, with annual revenues of $77.4 billion in 2018. Host of 25,000 employees in 190 countries.