The borders are represented by their width:
very narrow (1 mm), narrow (5 mm), medium (10 mm), wide (16 mm) and very wide (26 mm).
By type the borders are divided into "simple ", "classical", and "ornate".
Type and size of a border can be quickly identified by the file name:
bordN_M_K.ext, where:
N is the nominal border width from 1 to 5 (i.e. from "very narrow" to "very wide");
M is the nominal border type from 1 to 3 (i.e. from "simple" to "ornate");
K is the sequence number.
Each file contains four images on the gray-filled ground object: two borders 290 mm long (against the white-filled object that outlines the guilloche shape precisely, and without any background) and two corners set by these borders (against the white-filled object that outlines the guilloche shape precisely, and without any background).
The lines are 100% black. Lines width is 76 micron.
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