FIELD: polygraphy.
SUBSTANCE: transparent sheet has two lens-bitmap matrices 4,6 with various steps on different surfaces of sheet. Elements 7 of relief stamping of one of matrices have cross-section with at least two bends 11-14.
EFFECT: higher quality.
5 cl, 4 dwg
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Authors
Dates
2004-12-10—Published
1998-11-02—Filed