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Advances in Fingerprint Technology.pdf

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Figure 7.4 Comparison of a n<strong>in</strong>hydr<strong>in</strong> pr<strong>in</strong>t on a forged United States Treasury<br />

check before (left) and after Ag-PD treatment (right). N<strong>in</strong>hydr<strong>in</strong> pr<strong>in</strong>t is enhanced.<br />

Figure 7.5 Comparison of a n<strong>in</strong>hydr<strong>in</strong> pr<strong>in</strong>t on a counterfeit $20 note before<br />

(left) and after Ag-PD treatment (right). N<strong>in</strong>hydr<strong>in</strong> pr<strong>in</strong>t is enhanced and <strong>in</strong>k<br />

(from <strong>in</strong>kjet pr<strong>in</strong>ter) is removed.<br />

The Multi-Metal Deposition Process<br />

Background<br />

Saunders28,29 <strong>in</strong>troduced the multi-metal deposition (MMD) method for<br />

visualiz<strong>in</strong>g latent pr<strong>in</strong>ts on porous and nonporous surfaces. It is a modification<br />

of a biochemical technique used for sta<strong>in</strong><strong>in</strong>g prote<strong>in</strong>s. 30 The method

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