Compound without ink to print, process for manufacture of a compound without ink for digital printing, and digital printing ink solution without

摘要

"Compound without ink to print, process for manufacture of a compound without ink for digital printing, and digital printing ink solution without.A compound without digital printing ink includes a solvent, a maker of color such as a salt of transition metal.Compatible with the organic solvent and a revealing as 8-hydroxyquinoline and its derivatives, the developer capable of reacting with the color former to form the product color.Preferably black in color.A sufficient amount of a chelation agent.Such as a carboxylic acid is added to the solution to avoid the formation of color and the developer react in solution to form the product coloring while allowing the reaction when the solution isPlicada to area of the fingerprint of the person which will be taken to fingerprint and deposited on the substrate paper.