Nocopi Technologies Inc. is a provider of secure ink technologies. The Company develops and markets ink technologies for document and product authentication, and also offers specialty reactive ink technologies for the educational and toy market. The Company develops and markets four technologies: Overt, Covert, Entertainment and Specialty Inks. The Company's Overt technologies include Rub & Reveal, Reversible Rub & Reveal, CopiMark WaterMark and Magnetic Ink. The Rub & Reveal allows the users to print an image on the front or back of bond and thermal papers. The Covert technologies include CopiMark Invisible Ink and CopiMark Color Change. The Company's Entertainment technologies include Rub-it & Color. Rub-it & Color Ink brings a rainbow of colors without using crayons, coloring pencils or markers. Its specialty inks include Rub-it & Color and Novelty Inks. The Company offers its Rub-it & Color technology across various retail stores under the name Rub-n-Color.