1 Blind Inks
2 Numbering inks
3 Bip-Pen inks
4 Anti-Stokes inks
5 Coin revealable inks
6 Seri-Paint inks
7 Black-Paint ink
8 Thermic inks
9 Sympathetic inks
10 Watermark ink
11 RVI inks
12 Pearlescent inks
13 Iridescent inks
14 Photochromic inks
15 Thermochromic inks
16 Inactinic inks
17 Phosphorescent inks
18 Fluorescent inks
19 Erasable reactive inks
20 Secondary fluorescent inks
21 Water fugitive inks