The True Bio Bag is made in a kraft finish. We utilize a 3-layer composite material, which each single layer having been certified to both EU standards EN 13432 and American compostability standards ASTM6400. Each layer is made from natural wood pulp and corn.
The True bio bag has not been certified as biodegradable yet by a recognized international test lab, howeverat least 97% of the components of the bag are certified biodegradable according to the standards mentioned above. The non-compostable components are a water-based non-toxic adhesive and the printing inks, which are free of heavy metals. We have full confidence that the True Bio Bag will pass the biodegradability tests we currently have underway.
The zippers used are all certified compostable, and the one-way valves are made from a certified compostable plastic and currently being tested for biodegradability.
Our own tests indicate that the bag will compost in an environment with water, oxygen, heat and micro-organisms. However, if you add tin ties or non-biodegradable labels to the bags, you need to remove those before composting.