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Table 4 Fingerprints development scores using black powder technique on glass, metal and plastic surfaces submerged in fresh water at 1, 2and 10 days’ intervals according to fingerprints quality assessment scale

From: Development of latent fingerprints on non-porous surfaces recovered from fresh and sea water

Black powder

Time (days)

Number of deposited marks

Scores

   

5 (very good)

4 (good)

3 (poor)

2 (bad)

1 (blur/no)

   

n

%

N

%

n

%

n

%

N

%

Glass

1

10

4

40%

5

50%

1

10%

0

0%

0

0%

2

10

2

20%

7

70%

1

10%

0

0%

0

0%

10

10

0

0

0

0

5

50%

1

10%

4

40%

Metal

1

10

1

10%

6

60%

3

30%

0

0%

0

0%

2

10

0

0%

2

20%

6

60%

2

20%

0

0%

10

10

0

0%

0

0%

2

20%

5

50%

3

30%

Plastic

1

10

0

0

4

40%

4

40%

2

20%

0

0%

2

10

0

0

0

0%

5

50%

5

50%

0

0%

10

10

0

0

0

0%

0

0%

2

20%

8

80%