Glassine by SiOPack®: The sustainable revolution for paper-based window packaging
The era of plastic windows in packaging is drawing to a close. More and more companies – particularly in the food retail sector – are facing the challenge of finding sustainable packaging solutions that eliminate plastic without compromising product protection or visibility. This is exactly where Glassine by SiOPack® comes in: a technological innovation that enhances traditional glassine paper with a transparent, recyclable barrier coating – offering a genuine alternative to plastic window packaging.
What was long considered technically impossible – full transparency combined with an oxygen barrier, product protection and recyclability – is now a reality. The liquid-based coating, currently under patent application, can be applied inline during paper production or offline via flexographic printing systems. In other words: no retrofitting, no new supply chains, no system disruption – but instant impact. The potential of this development is already being demonstrated in the retail food sector. In a pilot project, traditional self-service bread bags with windows were switched to Glassine by SiOPack®. The result: the plastic content was completely eliminated, without compromising freshness, hygiene or visibility – and as a bonus, the clear view of the product also helps to deter theft in self-service areas.
While uncoated glassine paper is being tested in many places as a substitute for plastic windows, it often fails due to a lack of transparency. Glassine by SiOPack®, however, gives paper a new quality previously reserved for plastic. This opens up enormous potential, especially in the baked goods sector: in Europe alone, several billion bread bags with plastic windows are used every year. Switching to a paper-based, recyclable solution could eliminate over 150,000 tonnes of plastic annually – highly visible to millions of consumers, and with a tangible benefit to the environment and waste management systems.
But the scope of application goes far beyond bakery bags. Whether it’s muesli packaging, tea varieties, laundry detergent pearls, cosmetic products or pharmaceutical items – Glassine by SiOPack® allows many products previously packaged in plastic or opaque materials to now be presented visibly and paper-based. The visibility of the contents is not only functional but becomes a design element in itself: colours, fill levels or product shapes can be recognised without relying on print or plastics. Packaging thus becomes a stage, not just a container. For brands, this opens up entirely new creative possibilities – sustainable, eye-catching and fully compliant with future packaging regulations.
This solution is also particularly relevant for quick-service restaurants and e-commerce. Portion sachets for sauces or refill systems can be made just as recognisable, hygienic and paper-based as herbal teas or plant-based remedies on pharmacy shelves. Customers can see immediately what they are getting – a transparency that builds trust and supports purchasing decisions. The technology also proves that it’s not limited to packaging windows. SiOPack® has even developed a completely plastic-free paper-based beverage cup – another example of how functional paper packaging can be implemented in diverse and innovative ways.
To ensure the scalability and availability of the solution, intensive talks have already been held with leading paper manufacturers and packaging converters. The aim is to integrate Glassine by SiOPack® seamlessly into existing production processes – efficiently, economically, and with minimal barriers to market entry for all stakeholders. Initial trial runs with industrial partners confirm: the technology is ready for widespread adoption.
Glassine by SiOPack® is more than just a new packaging material. It’s a catalyst for genuine transformation in the packaging world. With no conversion costs, no compromises in processing – but with a clear vision: to rethink transparent packaging – circular, economical, and visibly sustainable. For brands looking to stand out at the point of sale while taking responsibility, now is the time to make the switch.
Plastic window packaging is a thing of the past.
The future doesn’t need a window – it is one.
