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Table 1 Standard categories used for differentiation of fingerprints after applying products (Sears et al. 2012; Almog et al. 2014)

From: Effects of oils, lotions, hand sanitizers, and mehendi on fingerprints captured through digital fingerprint scanner

S. no. Category of print Features of fingerprints Visibility score value
1. Very strong development (without application of product) control sample Identifiable fingerprint pattern, clear ridge details, minutiae, and sweat pores were clearly visible, no merging of the ridges, prominent appearance of the ridges, and fingerprint classification 81–100
2. Strong development (with application of product) Identifiable fingerprint pattern, clear ridge details, partially visible minutiae and sweat pores, slightly broad margins of the ridges and few or no clump-like formation, and less prominent merging of ridges at some points 61–80
3. Medium development (with application of product) Fingerprint pattern can or cannot be identified, broad margins and merging of the ridges, non-identifiable ridge details, less chances of appearance of sweat pores and minutiae, and less prominent appearance of the ridges 41–60
4. Limited development (with application of product) Partially visible fingerprint pattern, ridge details not clear, visible sweat pores, and no merging of the ridges 21–40
5. Weak development (with application of product) Fingerprint pattern can or cannot be identified, no visible ridge characteristics, and visibility of sweat pores with less appearance of the ridges 0–20