Printing ink is a gel, solvent, or solution mixed with a colorant, dye, or pigment and is used to produce an image, text, print, or design on a surface. Generally, inks are made up of pigments, binders, resins, and solvents (solutions). While there are many types of printing inks, we will review digital, solvent, and silicone printing inks and the industrial applications for each.
Inks have played an important role in sharing knowledge and information over the centuries. The earliest forms of ink were used in China around 2500 BCE. The inks were made from pinewood from vegetable oils.
In the mid-15th century, Johannes Gutenberg invented the printing press, which used an oil-based printing ink formulation to adhere to metals and paper materials. The printing press, along with printing inks, enabled mass production of books and rapid spread of ideas.
Over the centuries, advances in chemistry and technology have led to the development of modern inks. As a result, various printing processes have emerged, including offset, flexography, and digital printing. Today, printer inks are a cornerstone of industries ranging from publishing, promotional, and industrial to packaging, reflecting centuries of innovation and adaptation.