IR FLUORESCENT INKS

Inks containing fluorescent pigments which glow when exposed to visible light of 400-530 nm. Fluorescence appears in IR light of 850-950 nm as bright light images on a dark background.

     

a                                                                 b

a — Paper substrate. White light; 

b — the same. IR fluorescent inks. A picture on the page spread, a stitching thread


     

a                                      b

a —  Paper substrate. White light; 

b — IR fluorescent inks. Text, security fibers, a security thread


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