The substance reveals main fingerprint patterns (loops, whorls, arches) and minutiae (bifurcations, bridges, eyes, hooks).

"For quality assessment of the enhanced fingerprints, we analyzed the developed images using the UK Home Office scale, ...

RUU (if configured for such) will validate PKI (Public Key Infrastructure) certificate by contacting a Certificate Authority. High-end fingerprint technology: INCITS 378-2004 interoperable minutiae ...