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Historical Stamp Inks Identification with a Portable Raman Stamps are cultural heritage objects which give an amount of historical information that is invaluable. There is an increase in the amount of counterfeit historical inks; this is because historical stamps can hold a high monetary value as collector’s items. It is crucial that fraudulent stamps are able to be identified and removed from the market. The following review utilizes portable Raman to identify the colorants w...