Ink fades and it is not forever. A new printing technology has been lately developed and researchers claim its colors will never fade. It will not discolor over time and also the colors won’t bleach in the sun as the colors are generated from the structure and not from pigment.
Details of the new finding are published in the latest edition of Science Advances journal. It writes only three materials are required in the new technology and those are plastic, germanium and a protective coating.
The laser printer that is used today comes with traditional ink-based printing in which paper acts like the base. In the new discovery, plastic provides the foundation.
The new laser printing technique is designed by Anders Kristensen of Technical University of Denmark in Kongens Lyngby.
It is learned the plastic surface is equipped with such shape that it has many tiny pillars, about one in every 200 nanometers. Germanium is thereafter spread on it in a thin film over the plastic.
It is to know that germanium melts on the pillars after getting heated. The shape and thickness could be morphed and as a consequence specific color is reflected. The shape of newly carved nanostructures is protected by the coating.
According to researchers, the germanium film boosts color contrast as well as the resolution, which is up to 127,000 dpi.
Traditional laser printers reach up to 20,000 dots per inch whereas the existing ink-jet printers offer just 4,800 dots per inch resolutions.
Nanotechnology researcher Xiaolong Zhu from the Technology University and lead author of the study said the printing from new technology will not fade away and this is the advantage of such printers.