INVISIBLE AND FLUORESCENT INKS
Our company is specialised in the production of invisible and fluorescent inks.
Those inks are commonly used on all kind of security documents. Fluorescence, invisible in daylight or artificial light, becomes visible when exposed to an Ultra-Violet light (Black light or Wood light) and does not produce, as it is the case with phosphorescence, any after-glow (persistence of fluorescence after switching off the Ultra Violet light).
The choice of fluorescence shade is virtually limitless, but black and white fluorescences do not exist. Those inks can be printed in all printing processes and have to be used on papers without brightening agent (UV dull papers).
A chromotropic inks shows one colour under normal light and another shade when exposed to UV light (for example brown PMS 168 fluorescent Green). –
Our bi-fluorescent inks are invisible to the naked eye and will show 2 different colours of fluorescence, depending on the wavelength of the UV light (most common are 365nm and 254nm). For example an ink will be invisible, and fluorescent Green under 365 nanometers and Red under 254 nanometers.
We have developed a range of shades that cannot be reproduced neither by a photocopy machine nor by a scanner. Those inks are known as anti-copy inks: the main colour available is a very bright Orange that will turn either yellow or brown when copied. We have also a Pink shade that will also show a colour change. Moreover in case of any doubt, the use of a portable UV lamp will show the total lack of fluorescence of the photocopy.
VISIBLE AND FLUORESCENT INKS
Those inks are, for example, visible in daylight Blue and Fluo Blue, Green fluo Green, Yellow fluo Yellow, Red fluo Red. A printed document with those inks will show a fluorescence while its copy will not have this fluorescence.