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Does Bioglitter® contain aluminium, and if so, how can it still be called biodegradable?

Helpful Information, Product Information

Some but not all Bioglitter® products contain aluminium. It is used in an extremely thin coating to give glitter its shine. Aluminium is the most abundant metallic element in the earth’s crust and does not biodegrade, however materials that do not biodegrade are not necessarily harmful to the environment. The aluminium in Bioglitter® represents less than 0.1% by weight and is neither toxic nor ecotoxic. Biodegradability standards typically call for at least 90% of material to biodegrade within the testing period.  Our journey with Bioglitter® will take the biodegradable content to its maximum and beyond the minimum 90% requirements of the standards.