Technical note: latent fingermarks, colloidal gold and multimetal deposition (MMD)  Bertrand Schnetz, P Margot  Forensic Science International  Volume 118, Issue 1, Pages 21-28 (April 2001) DOI: 10.1016/S0379-0738(00)00361-3

Fig. 1 Gold particles (∼30nm) prepared according to Saunders [1] under the TEM. Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 2 Homogeneous gold particles, size 14nm prepared according to Slot and Geuze [7]. Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 3 Left side pH 3; right side pH 2.5 (fingermark after the colloidal gold treatment only, without further development with physical developer). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 4 Left side 0.01% w/v; right side 0.005% w/v (fingermark after colloidal gold treatment only). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 5 Left side 0.01% w/v; right side 0.02% w/v (fingermark after the colloidal gold treatment). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 6 Effect of siliconized vessels on glass for the preparation of the gold solution: left, not siliconized; right, siliconized vessels. Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 7 On the left, distilled water was used; on the right, bidistilled water (fingermark after the colloidal gold treatment). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 8 Example of a fingermark developed on a porous surface (here white paper) using the proposed optimised method (on the right) against the old (left). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 9 Example of a fingermark detected on a non-porous surface (white polythene plastic bag) with the optimised technique on the right. Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 10 Common background noise observed after physical developer treatment on plastic using the traditional physical developer (left) or the optimised recipe (right). Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)

Fig. 11 Case example: successful detection of a mark on a Swiss banknote that resulted in an identification. Forensic Science International 2001 118, 21-28DOI: (10.1016/S0379-0738(00)00361-3)