|
Mouseover image to reveal differences in infrared absorption |
TECHNOLOGY FOR QUESTIONED DOCUMENT EXAMINATION | |||
Infrared Absorption / Dropout
When illuminated with infrared of a wavlength between 700-1000nm some inks become transparent, dependent on their chemical composition, effectively to disappear . The effect will often reveal an alteration to a document where a different type of ink, although identical in colour, has been used. Such infrared transparent inks are also used as a security feature.
|
||||
| EXAMINE IR ABSORPTION USING THE FOLLOWING PRODUCTS |
|
VSC6000/HS the leading document examination system VSC400 compact and verstaile document examination system VSC40/HD Range modular systems configured to meet user requirements |
