Fingerprints (image) Penn State Caption The fingerprint on the left was prepared using an older development technique and does not show much ridge detail. The image on the right was prepared using new CTF technique and shows a lot of ridge detail. Both images are right and left halves of the same fingerprint. Credit Akhlesh Lakhtakia, Penn State Usage Restrictions Non commercial use only Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.