Unveiling the Making of the Rorschach Test.

The Rorschach ink blots, used for psychological diagnosis around the world, have been reproduced for over a century, but the process of printing them has remained a secret until now. The ink blots were created by Swiss psychologist Hermann Rorschach, who developed his own test using images that seem not to have been made at all but which were not simply random. The printing process is so secretive that even the printer does not know it all, and new copies are only printed every five years or so.