Metameric Colors
Two colors appear similar under normal lighting conditions, but because of differences in spectral/chemical composition, will appear dramatically different when viewed with a filter or differing light sources.
Microprint
An extremely small line of text characters, symbols or images, indiscernible to the naked eye, printed at high resolution beyond the capabilities of desktop printers or scanners. This feature is often hidden in background design of vital records or as a signature line on checks and may contain intentional mistakes.
Moiré Pattern
The unwanted interference pattern created when overlapping halftone dots or lines at irregular screen angles. This pattern is also used as an authenticator when intentionally printed.
Optically Variable
Materials such as foils and films that change their appearance when viewed at different view angles or lighting conditions.
Rainbow Printing
A printing technique in which two colors are blended together to create a continuous and gradual transition from the first color to the second or more.
Secure Font
A unique typeface that is not available on the commercial market or that is created as a unique image(s) exclusively for one client.
