Table 1 Fingerprint quality assessment over 30 days for surfaces submerged in tap water.
Surface type | Grade 5 (Days) | Grade 4 (Days) | Grade 3 (Days) | Grade 2 (Days) | Grade 1 (Days) |
|---|---|---|---|---|---|
Glass | 1–15 | 16–23 | 24–27 | 28–30 | – |
Plastic | 1–10 | 11–21 | 22–29 | 30 | – |
Metal | 1–8 | 9–13 | 14–24 | 25–28 | 29–30 |