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A metallic strip embedded in the note, surfacing in windows.
Also known as: Metal strip in a banknote, Dashed silver line on a note
A narrow strip running through the note, appearing as a dashed line on the surface and as a continuous dark band against the light. The alternation between buried and exposed is itself the check: a printed imitation is continuous on both.
A narrow strip incorporated into a banknote during manufacture, weaving to the surface at intervals so that it appears as a broken line in reflected light and as a continuous dark band in transmitted light.
Contexts: Public information
The alternation is the check. A note printed to imitate the thread shows the same appearance whichever way it is lit, and holding it to the light distinguishes the two instantly.
A narrow vertical strip crossing the note, appearing as a row of short metallic dashes on the surface and as one unbroken dark line when backlit.
Both are substrate features an issuer publishes for public checking.