Seal and other covert anti-counterfeiting printing ink UV Fluorescent Ink colorless, as in ultraviolet light (200 ~ 400nm) irradiation, which could give visible light (400 ~ 800nm), according to the color change can be divided into colorless, colored, color three, colorless and can display red, yellow, green, and blue color; colored original colors can appear more vivid; color make a color into another color. The use of anti-counterfeit labels printed with the seal of autonomy and randomness, while easy to operate, low cost, has been widely accepted, such as red red fluorescent ink printed invoices seal. The company produces the seal of covert anti-counterfeiting not only as traditional stamp-pad ink stamp-pad ink stamp as printed on the paper with the absorbent can also be a good printed in a variety of non-absorbent materials (such as PP, PE plastic) as well as can be According to the need to achieve stealth effect.