Table 1 Fingerprints development scores using black powder technique on glass, metal and plastic surfaces submerged in sea water at 1, 2 and 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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | 5 (very good) | 4 (good) | 3 (poor) | 2 (bad) | 1 (blur/no) | |||||
| Â | Â | Â | N | % | n | % | N | % | n | % | n | % |
Glass | 1 | 10 | 0 | 0% | 4 | 40% | 6 | 60% | 0 | 0% | 0 | 0% |
| Â | 2 | 10 | 0 | 0% | 4 | 40% | 5 | 50% | 1 | 10% | 0 | 0% |
| Â | 10 | 10 | 0 | 0% | 0 | 0% | 0 | 0% | 0 | 0% | 10 | 100% |
Metal | 1 | 10 | 0 | 0% | 0 | 0% | 3 | 30% | 6 | 60% | 1 | 10% |
| Â | 2 | 10 | 0 | 0% | 0 | 0% | 3 | 30% | 4 | 40% | 3 | 30% |
| Â | 10 | 10 | 0 | 0% | 0 | 0% | 2 | 20% | 1 | 10% | 7 | 70% |
Plastic | 1 | 10 | 0 | 0% | 0 | 0% | 2 | 20% | 3 | 30% | 5 | 50% |
| Â | 2 | 10 | 0 | 0% | 0 | 0% | 2 | 20% | 2 | 20% | 6 | 60% |
| Â | 10 | 10 | 0 | 0% | 0 | 0% | 2 | 20% | 2 | 20% | 6 | 60% |