Method for the manufacture of security paper

Details Method for the manufacture of security paper Method for the manufacture of security paper

1995-06-07

1999-02-16

Silverman, Stanley S.

Paper making and fiber liberation

Processes and products

Safety, identification and fraud preventing paper

162110, 162117, 283113, 283 72, 283 83, D21F 1100, B41M 310

Patent

active

058716157

ABSTRACT:
Security paper carries an intricate tactile surface profile pattern which has been imparted to the paper during its manufacture, at a stage after initial de-watering but before final drying, by passing the paper through a nip between a forming surface corresponding to the desired pattern and a backing surface. The tactile pattern is of excellent durability, and its intricacy offers a high degree of security. The tactile pattern is visible when viewed under low angle light, which facilitates verification or authentication of security documents made using the patterned paper.

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patent: 4216055 (1980-08-01), Watanabe et al.
patent: 4715623 (1987-12-01), Roule et al.
patent: 4720325 (1988-01-01), Rausing et al.
Norris, F.H. "Paper and Paper Making", p. 163, 1952.
"Watermarks, A Brief History and Survey of the Techniques", last page (excluding glossary and acknowledgements), third paragraph from the end, 1973.
Leach, R.H. et al, "The Printing Ink Manual", Fifth Edition 1993, pp. 40 and 41.
"Packaging in the Making", trade literature of Sandon, Runcorn, United Kingdom, published 1991.
"Zedco Rapide", trade literature of Zedco, Hersham, United Kingdom.

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