Laser coding technology offers additional security
A new coding and marking technology using lasers has a number of potential applications in the pharmaceutical sector. Developed by Sherwood Technology, a spin-off from Nottingham University in the UK, DataLase uses a low power steered beam CO2 laser to bring about an irreversible colour change on the substrate.
The technology is based on thermo and photonic reactive chemistry that responds to the laser energy. At present the change is only available in monochrome, but multicolour and clear coating versions are currently under development. The additive consists of non-toxic inorganic or organometallic substances that are incorporated into the ink, coating or even the substrate itself, depending on the application.
Compared with other coding and marking technologies, DataLase is said to offer economy, with faster line speeds and no consumables; safety, with non-solvent based inks and low emissions; and quality, with better image resolution and a wider choice of substrates.
According to Sherwood Technology, there has been great interest in DataLase, with potential applications including direct marking onto coated tablets, and contrast marking onto the aluminium foil of blisterpacks, rather than the embossed marking currently used.
As the laser can be used through transparent materials, codes can be applied to boxes after they have been shrinkwrapped for added security. Furthermore, the technology is difficult to reproduce, and so could be used as an anticounterfeiting device.