Acid indicator based high saturation sympathetic ink having time

Details Acid indicator based high saturation sympathetic ink having time Acid indicator based high saturation sympathetic ink having time

1977-05-13

1979-10-23

Lieberman, Allan

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 22, C09D 1100, C09D 1102

Patent

active

041719824

ABSTRACT:
Disclosed is an ink that is intensely colored in solution with the vehicle of the ink. The ink "disappears" or becomes invisible to the naked eye after a period of time has elapsed from the application of the ink to a record document, the ink being utilized to identify an unsatisfactory character on a document such as a MICR check which has had an erroneous character printed which must be corrected before being correctly machine read.

REFERENCES:
Lesser, Milton A., Invisible or Sympathetic Inks, an American Ink Maker, Nov. 1945, pp. 27-30.

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