Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing superposed layers
Patent
1981-12-17
1984-07-03
Welsh, John D.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing superposed layers
283114, 40427, 106291, 428195, 430 11, G09F 1912
Patent
active
044575408
ABSTRACT:
A multicolor printed product includes a base and a plurality of color component images printed on the base in superimposition upon one another. An additional image including a pearl luster pigment is superimposed upon the color component images, preferably adjacent to the uppermost color component image. The pigment is applied more heavily at those areas of the composite image consisting of the color component images which correspond to lighter areas of the composite image, and such pigment is applied less heavily at areas corresponding to rich color areas of the composite image. The printing plates which are used for the printing of the color component and pearl luster images are manufactured with the aid of films obtained by photographing the original in the component colors or by copying from at least one of the color component films. The manufacture of the pearl luster film involves photographic reversal procedure relative to the color component films.
REFERENCES:
patent: 3493410 (1970-02-01), Morita et al.
patent: 4038099 (1977-07-01), DeLuca et al.
Yule, Principles of Color Reproduction, Wiley and Sons, N.Y., (1967).
Druckerei Gorius
Kontler Peter K.
Welsh John D.
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