KELLY, P.F., KING, R.S.P. and MORTIMER, R.J., 2008. Fingerprint and inkjet-trace imaging using disulfur dinitride. Chemical Communications, 46, pp. 6111 - 6113.
Exposure of fingerprints to S2N2 vapour results in the prints being visually imaged by polymeric (SN)x on an unprecedented range of media; in addition, the polymer forms in response to the interaction of S2N2 with traces of inkjet inks, for example the minute amounts left by the contact between printed paper and an envelope.