21.02.2013 Views

Advances in Fingerprint Technology.pdf

Advances in Fingerprint Technology.pdf

Advances in Fingerprint Technology.pdf

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Work<strong>in</strong>g solution<br />

Stock solution 6 mL<br />

Sodium perborate 0.5 g<br />

Colloidon-ethanol-ether solution 120 mL<br />

Note: Mix the stock solution and sodium perborate well, add the colloidon-ethanolether<br />

solution, and mix well aga<strong>in</strong>.<br />

Procedure<br />

Spray the surface conta<strong>in</strong><strong>in</strong>g the bloody f<strong>in</strong>gerpr<strong>in</strong>ts two or three times from<br />

a distance of about 10 <strong>in</strong>.<br />

Reagents<br />

b. Phenolphthal<strong>in</strong><br />

Stock solution<br />

Phenolphthal<strong>in</strong> 2 g<br />

Potassium hydroxide 20 g<br />

Distilled water 100 mL<br />

Powdered z<strong>in</strong>c 20 g<br />

Note: Reflux until the solution becomes colorless (typically 2 to 3 hr). Store <strong>in</strong> a dark<br />

bottle with some z<strong>in</strong>c powder at the bottom.<br />

Work<strong>in</strong>g solution<br />

Stock solution 20 mL<br />

Ethanol 80 mL<br />

3% Hydrogen peroxide 5 drops<br />

Procedure<br />

Apply the work<strong>in</strong>g solution to the surface conta<strong>in</strong><strong>in</strong>g the bloody f<strong>in</strong>gerpr<strong>in</strong>ts<br />

and allow it to dry.<br />

Reagents<br />

c. Leucomalachite green<br />

Leucomalachite green 1 g<br />

Ethyl ether 70 mL

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!