The identification of the source of a printed document(s) can be important in forensic investigations involving a wide range of fraudulent materials, including counterfeit currency, travel and identity documents, business and personal checks, money orders, prescription labels, travelers checks, medical records, threatening correspondence and financial documents. Determination of the make and model of a printer or photocopier that has been used in the commission of a criminal or illegal activity can provide an important investigative lead for law enforcement officials. The growing complexity of toners and inkjet ink formulations provides an opportunity to identify these printing media to a high degree of specificity, based on their respective chemical compositions.This paper describes current analytical methods used to characterize commercial toners and inkjet inks, by the identification of their resin, colorant and additives components, and illustrates how these chemical profiles can be compared to authenticate and link forensic documents with a common source(s) in their production history. The creation of a fully searchable database comprised of the recorded chemical and physical properties of commercial jet inks and toners, as well as a library collection of samples of these printing media for comparative testing, is also discussed.