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Method 6:Soapy Water Fingerprints

Group A: BC007

Before:

bc007-ifp


After: (No fingerprint visible even with naked eye)

After   Soapy Water


Group B: BC020

Before:

bc020-ifp.jpeg

After: (fingerprint faintly visible)

After

Group C: BC017

Before:

bc017-ifp.jpeg

After: (No fingerprint visible even with naked eye)

after