"Since 2018, Primark has been working with Oritain to verify the sustainable cotton it uses. Oritain uses forensic science to analyse the intrinsic properties of cotton and other fibres and use the data to identify the material’s unique ‘Origin Fingerprint’, which cannot be replicated.
Cotton naturally absorbs different levels of chemical elements specific to the local climate and geological conditions it’s grown in. Oritain tests the differences in these elements and uses the data to create a unique ‘Origin Fingerprint’ that can’t be replicated. To date Oritain has mapped more than 90 percent of the world’s cotton in a database. Fabric and yarn can be tested at almost any point in the supply chain against the genuine Origin Fingerprint stored in the database to see if they match."