Luminescents materials: pigments, inks, paints

Are you looking for a fluorescent or phosphorescent coating?

OliKrom is an internationally recognized player in the field of luminescent materials.

Our mastery of the most advanced concepts in materials science allows us to design and produce high performance inks and paints with optimized colors and light emission: green, blue, orange, yellow,...

Our high light emission products

luminescent-inks

Luminescent ink

Nature : solvent-based or UV photocurable ink
Support : to be defined according to the project
Application : Screen printing - Flexography - Pad printing

luminescent-paint

Luminescent paint

Nature : solvent or aqueous phase
Support : to be defined according to the project
Application : Spray - Brush - Roller - Aerosol can

Features

Fluorescent coatings: wide range of daylight and night colors: blue, green, yellow, orange, violet, black...
Nighttime illumination at 265 nm, 365 nm, 380 nm, 390 nm, 405 nm

Phosphorescent coatings : wide range of daylight and glow in the dark colors: blue, green, yellow, orange, violet, black...

All our high performance products (paints, inks...) are produced at our ISO 9001 certified industrial site in Pessac, France, following rigorous manufacturing processes and under the continuous supervision of our quality manager.

We create our own pigments and dyes. However, we only deliver our luminescent products in the form of inks and paints to guarantee the super luminous performance of the final coating.

Our custom super luminous products

Our teams have developed a wide range of luminescent products: pigments, dyes, inks, paints with a large variety of colors. Depending on the specificity of your project, we distinguish between fluorescence which stops as soon as the illumination stops, and phosphorescence which persists.

  • Concretely, the rapidity of fluorescence is due to a de-excitation mecanism between two states of the same multiplicity (ΔS=0) which respects the selection rules of photon emission of quantum mechanics. At the molecular scale, the transition occurs between a singlet S1 and the ground state S0 without a change in multiplicity.
  • Phosphorescence is a phenomenon of de-excitation between two states of different multiplicity which is not allowed by the quantum model, but is made possible by the spin-orbit coupling. The transition is consequently slow to take place. In molecular chemistry, the phosphorescence process is generally encountered during the relaxation between an excited state T1 (triplet) and the ground state S=0, involving a change of multiplicity.

Depending on your project, we are able to design and produce two classes of luminescent materials.

Are you looking for a specific property adapted to your specifications?

The luminescence properties of all our materials are systematically characterized:

  • the emission spectrum gives access to the variation of the intensity of the emitted light according to the wavelength;
  • the quantum yield informs on the luminescent performance of the material. It varies from 1 (all absorbed photons are re-emitted) to 0 (the compound is not luminescent);
  • the luminescence lifetime is the characteristic time of the emission. In most cases, emission follows an exponential probability law in exp (- t/τ), where τ is the lifetime. The order of magnitude of the lifetime of many substances is the nanosecond (billionth of a second). In phosphorescence, the lifetime can reach several hours.

Our fluorescent materials

fluorescent-material

Optimal formulation of materials with super luminous properties. Adjustment of the excitation wavelength in the ultraviolet, visible and/or infrared range. Optimization of the intensity at different colors.

Our phosphorescent materials

phosphorescent-material

Optimized formulation of phosphorescent coatings capable of reaching a luminescence of more than 10 hours. Adjustment of the excitation wavelength in the ultraviolet, visible and/or infrared range.
Modulation of the daylight and glow in the dark (blue, green, yellow, red...).

Luminescent materials: fields of application

Fluorescent coatings

Revêtements Fluorescents

Fluorescence is frequently used in our daily life. For example, detergents contain "optical brighteners", as does paper. These are compounds that emit a blue light to compensate for yellowing and give an impression of whiteness. There is also a multitude of "fluorescent" objects: markers, accessories, clothing... Banknotes are marked with compounds whose fluorescence can be caused by a small UV lamp.

Fluorescence is also an extremely sensitive analysis tool, used in particular by the scientific police. It can be used, for example, for the detection and dosage of pollutants (such as lead, cadmium, mercury), but also molecules of biological interest (such as glucose), gases (O2, CO2, NO...), traces of explosives...

Finally, fluorescence has many applications in the medical field. In addition to measuring the concentration of useful - or harmful - substances in blood or urine, fluorescence can be used as a diagnostic method for certain cancers (bladder, breast). This type of emitting sensors is also used to visualize arteries and veins (angiography).

Phosphorescent coatings

LuminoKrom®-photoluminescent-paint

The applications of long-lasting glow in the dark are now widely deployed in the interior signage of buildings, emergency exits, luminescent adhesive strips...

In this field, we have deployed a patented LuminoKrom® technology, a photoluminescent paint capable of emitting more than 10 hours in the dark. Since 2018, a large number of local authorities and infrastructure managers have adopted this innovation, both in France and abroad.

Bicycle paths, pedestrian walkways, locks, traffic circles, crosswalks, etc. are equipped with this luminescent marking that lights up night after night, relentlessly, with the same intensity always renewed. Its unique process makes it a real asset for tomorrow's infrastructures: an autonomous, renewable energy, economical and eco-sustainable illuminated signage.