Blind Embossing
A colorless relief image applied to the substrate by deforming the material under pressure. On the paper substrate the image is produced by pressure, on the polymer substrate — by pressure and heat (embossing). Visualised in oblique and/or sliding light, has a tactile effect, may have convex or concave relief.
a
b
Fig. 1. Madagascar. Passport issued in 2014:
a — back cover. Blind embossing (text and country outlines); b — the same. Zoomed fragment. Oblique light
a
b
Fig. 2. New Zealand. Certificate of identity issued in 2016:
a — data page. Polymer substrate. Embossing (marked with arrows); b — the same. Zoomed fragment. An image of a bird with the contours formed by microprinting. Sliding light
a
b
Fig. 3. Australia. Emergency passport issued in 2009:
a — front endpaper. Paper substrate; b — the same. Blind embossing. Oblique light