Invisible Ink:

Chief use:
To prevent imitation, forgery of important documents, and to help identify genuine items from fake ones.

Application:
Any good fountain pens sold at office and school supplier, specially supermarkets throughout the world, can be used in writing. Can also be applied with commonly used rubber stamp pad. It is highly fluid and very excellent if used for writing with good fountain pens.

Scanner:
After application on paper, the ink dries quickly and become invisible. It means that the writing cannot be seen with naked eye in daylight, but is very clearly visible with black light scanner or commonly called ultraviolet light because the dried ink absorbs ultraviolet light from the scanner and thereby emission takes place.