Question

What is the powdery material found on old currency notes or old rubber or paper?

Answer 1

✔HEY THERE MATE ,
YOUR ANSWER IS HERE

it is copperizeium.

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Answer 2

Papers from different countries are used for producing new currency notes that are different from earlier currencies. the currency contain not only paper but also wood pulp, plastic etc are mixed in proportion which is then approved by RBI.Copperizerium is the powdery material found on old currency notes or old rubber or paper.