• Printpack's technology allows photochromic ink to be hidden in the graphics and revealed on exposure to sunlight.
    Printpack's technology allows photochromic ink to be hidden in the graphics and revealed on exposure to sunlight.
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Printpack, a manufacturer of flexible and specialty rigid packaging based in Atlanta, USA, has released a new way for brands to engage with consumers involving 'invisible' graphics that get revealed when exposed to sunlight. PKN saw the technology showcased at PackExpo Las Vegas last month.

The technology – utilising a proprietary process invented by Printpack – allows for photochromic ink to be hidden within standard graphics and remain invisible until exposed to sunlight.

The process represents the first time photochromic ink has been applied to a flexible film, giving brand owners new options for interacting with their customer base. Interactive packaging is proven to capture consumer attention and encourages engagement with the brand in a meaningful way.

“This type of packaging application can truly set a brand apart by adding depth to the consumer experience,” says Mark Brogan, director of technology and innovation at Printpack. “It can make all the difference when it comes to purchasing decisions.”

Applying photochromic ink has been a challenge for the flexible packaging industry for years, particularly in high speed production environments – in turn limiting options for brand owners looking to differentiate their product. Printpack’s R&D team designed the innovative process to apply the ink while still upholding the integrity of the packaging design and graphics.

Printpack's technology allows photochromic ink to be hidden in the graphics and revealed on exposure to sunlight.

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