Luminescence time of our phosphorescent paints
Luminescence duration of +10 hours
LuminoKrom® is the only photoluminescent paint on the market with a certified luminescence level of class G based on the international standard ISO 17398. This luminescent intensity ensures a high level of quality and that the marking remains visible at night for up to 10 hours !
The exceptional photoluminescence performance of LuminoKrom® paints has been certified by an external COFRAC-accredited optical metrology organisation.
Choosing a COFRAC-accredited luminescent road paint, such as the entire LuminoKrom® paint range, guarantees a top-quality product, offering increased safety thanks to a luminescence time of 6 hours to more than 10 hours for certain products.
This certification ensures that the paint meets the strict performance and durability standards essential for optimum visibility on the road, particularly in low-light conditions.
Everything you need to know about the principle of photoluminescence
The only objective and measurable criterion for expressing visibility time in a taskbook
There is a standard reference for measuring and guaranteeing the luminescence levels of luminous coatings: CE standard ISO 17398 "Colours and safety signals", which classifies light technologies type based on their luminescence signal and emission measured in millicandela/m².
The international standard ISO 17398 concerns luminous material and sets out the methods for assessing the luminescence duration of phosphorescent materials. Published by the International Organization for Standardization (ISO), this standard provides guidelines for assessing the performance of a phosphorescent material by measuring its luminous persistence life duration and luminescent signal detection.
Different luminescence performances
ISO 17398 provides a classification based on the performance and durability of coatings, on an increasing scale from A to G according to the levels of luminescence measured (brightness and light diffusion duration). The table opposite shows the classes of entities according to their level of emission measured after 2 min, 10 min, 30 min and 1 hour of darkness.
These measurements make it possible to draw the emission curve of a coating with the use of paint and to anticipate the reaction of the intensity emitted below 8 millicandela/m². This is the level that can be estimated as the limit for detecting the luminosity of a marking in the dark, in an outdoor environment. Above this threshold, the eye will be unable to detect the luminescence signal.
Luminescence is an intangible datum that refers to the CE ISO 17398 standard. Include in your specifications the minimum classification expected for photoluminescent marking and, above all, request certification from an accredited laboratory.
Luminescent road paint: are all markings the same?
Be careful, not all phosphorescent road paints on the market have the same performance or the same level of detection and life-time!
LuminoKrom® is the only photoluminescent beacon that lights up for 10 hours (class G product) to ensure user safety.
There are other products and offers on the market from different suppliers, but beware of luminescence emission time!
The majority of products have luminescence that fades rapidly at night after 2 to 3 hours (classes B/C/D). In this case, the benefit of enhancing visibility and detection on a cycle path and/or pedestrian walkway in the dark will be extremely limited. You'll be disappointed by those products in terms of performance and low signal emission !
- Specify a paint with a luminescence level certified to the international standard ISO 17398.
- Ask for a certificate stating that the product has Class G luminescence, which shows a signal level of more than 10 hours.
Every two days, a glow in the dark marking is applied in the world using a paint from the LuminoKrom® range. Since our first historic marking 5 years ago, we have had more than 450 applications worldwide, in terms of industrial marking, road safety or soft mobility facilities.
This experience has now shown that phosphorescence used in photoluminescent produt is perfectly durable for increasing the visibility and orientation of users (cyclists, pedestrians, etc.) in areas where there is no public lighting.
The presence of a glow in the dark guide provides reassurance and better orientation in the dark, when light is low or non-existent.
We know that luminescence performance remains invariant to sunlight conditions (sun, rain, fog), summer and winter alike. Similarly, photoluminescent efficiency and response have been demonstrated even in wooded environments, as well as indoors with artificial lighting. Our luminous technology still show high level of light performance.
For example, LuminoKrom® will continue to detect the marking on the ground of a secure cycle path for years to come. We experimented with LuminoKrom® on several test greenways near Bordeaux more than 5 years ago, and the results were amazing... Our markings continue to provide visibility for users year after year.
All our LuminoKrom® photoluminescent paints are manufactured at our OliKrom industrial site in Pessac (33 Bordeaux) in France.
Depending on your project, we offer a wide range of photoluminescent markings in solvent and aqueous phases, in a variety of colours (almond green, white and yellow) and on a variety of substrates (asphalt, metal, etc.). Our production capacity in Bordeaux adapts to demand, and the average delivery time for LuminoKrom® markings is 7 working days.
Each batch is accompanied by a performance certificate. Our Bordeaux plant carries out quality control at every stage of production.
All our LuminoKrom® markings are characterised in accordance with the ISO 17398 and NFX 08-050-1 standards and certified by an external COFRAC-accredited optical metrology organisation.
Luminous performance is measured over more than 10 hours, noting intensities at 2 min, 10 min, 30 min and then 60 min (after an excitation phase using reference lighting of 1000 lux) and an extinction time (in minutes).
A classification of luminosity performance
ISO 17398 provides a standardised framework for assessing the luminescence duration of phosphorescent materials, which is crucial for guaranteeing the reliability and quality of solutions that use these materials, such as safety devices, signage products and road markings, decoration or even watch accessories such as watch dials.
FOR MORE INFORMATION – Luminescence plays a crucial role in watchmaking, offering practical and aesthetic benefits to various accessories and watches. The use of luminous materials, in this case with fluorescent properties, brings benefits to watches and their dials. The main reason for using luminescence, such as fluorescence, in watches is to improve legibility in low light or total darkness. The ability of hour markers, hands and other dial elements to glow in the dark allows wearers to read the duration easily, even in the dark or in dark environments.
Lire la suite Here are a few key points from the ISO 17398 standard, which shows high luminance and light signal performance: RéduireTests to assess the lifespan of a light source
