De La Rue, who make bank notes for the three main Scottish banks, has found that more detailed analysis revealed animal derivative equivalent to a maximum of 0.003% per banknote.
De La Rue De La Rue released a statement which said: "Our initial analysis of our supply chain suggested that our polymer substrate did not contain any traces of tallow, and we advised specific customers on this basis.
"However, recognising the concern expressed by the public in recent days, we have undertaken a detailed and thorough review of our polymer supply chain. This review has identified the potential for minute traces of animal derivative, equivalent to a maximum of 0.003% per banknote.
"We are now working with our suppliers to identify ways of addressing this."