The Digital Watermarks Initiative HolyGrail 2.0 – facilitated by AIM, the European Brands Association, as the next iteration of the initial HolyGrail project under the Ellen MacArthur Foundation (2016-2019) – is a pilot project with the objective to prove the viability of digital watermarking technologies for accurate sorting and consequently higher-quality recycling, as well as the business case at large scale.
Digital watermarks are imperceptible codes, the size of a postage stamp, covering the surface of a consumer goods packaging and carrying a wide range of attributes. The aim is that once the packaging has entered into a waste sorting facility, the digital watermark can be detected and decoded by a standard high-resolution camera on the sorting line, which then – based on the transferred attributes (e.g. food vs. non-food) – is able to sort the packaging in corresponding streams. This would result in better and more accurate sorting streams, thus consequently in higher-quality recyclates benefiting the complete packaging value chain.
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