What is a Photoluminescent Pigment?

Photoluminescent pigment, also known as glow in dark pigments or long lasting luminous pigment, can be used to create stunning artwork and decorative effects. They absorb UV light during the day and release energy in the form of a long-lasting ambient glow at night.

Our iSuoChem(r) photoluminescent pigment powders are based on strontium aluminate with rare earth elements, which can store and emit energy after being absorbed by visual light, sunlight, white lamp or UV-radiation.

1. Brightness

A photoluminescent pigment is a unique type of chemical material that has the ability to absorb light energy, whether natural or artificial, and then glow in the dark. The intensity of the glow will vary, depending on the amount of light absorbed and the size of the particles.

These particles absorb UV light from the sun and other sources, and then release the stored energy as visible light when placed in the dark. This is called phosphorescence and can be seen on the surface of the pigment as a glow that lasts for hours or days.

Luminescent powders are non-toxic and can be made from a variety of different mineral bases. The most common is strontium aluminate which has been proven to be the best material for producing self-luminous safety items for fire and building egress identification.

Strontium aluminate is an active material which can be activated by rare earth elements to produce long lasting glow in dark pigments that have been shown to be at least 30 times brighter than traditional luminescent materials. It can also be used repeatedly and is non-radiative, non-toxic and harmless to humans and the environment.

This new type of phosphorescent pigment was produced by activating alkaline earth aluminate with rare earth ions. The main characteristics of this new pigment are strong light absorption, light storage and light emission capacity, as well as long persistence time, compared to zinc sulfide phosphorescent pigments.

This material has been used in a variety of applications including place-name signs, household electric appliances, clocks and watches, finery, garments, craftworks and gifts, as well as fire prevention products. The high brightness and long afterglow time are excellent for producing self-luminous safety products, which can help identify fire egress routes in the event of a fire emergency.

2. Long glowing time

The long glowing time of photoluminescent pigments is a result of their ability to absorb and store light energy. They are able to glow for hours after they are turned off. This allows them to be used repeatedly.

The length of the glow will depend on the intensity and the quality of the light source. For example, if the light is weak, the glow will be less intense and may not last long.

This means that it is important to use a strong, good quality light source when using luminescent pigments. It is also essential that the photoluminescent pigment product is charged correctly so that it will glow properly.

For example, if the pigment is placed in a deep shadow and not exposed to a good light source for long enough it will never charge completely. It is best to leave it exposed to good light for at least 5-7 minutes to get the maximum charging level possible from the product.

These pigments are based on strontium aluminate, which is non-toxic, harmless and non-radioactive. They have a higher brightness than traditional zinc sulfide base luminescent pigments and are able to glow for more than 12 hours.

They can be used for a wide range of applications, including emergency escape routes, warning signs, nameplates, and fire control. They can also be applied into a variety of products such as toys, watches, switches and other items.

Research has shown that glow worms have evolved a way to avoid the interference of artificial lights. They have a sticky net that keeps them from falling off of their nests. When the glow-worms are exposed to a temporary light source, the threads get covered with droplets of water that keep them from falling off. This helps prevent the worms from losing their nests and their signaling abilities.

3. Stability

A photoluminescent pigment is a special phosphorescent material that stores light energy in its crystals for a long time. It absorbs various kinds of visible light from daylight or stray lights and emits the stored energy into the surrounding area at night. This can make it a very useful and practical product for a variety of applications such as safety way-guidance and emergency signage or marker tapes.

Stability of the photoluminescent pigment is a crucial issue for many applications. This is why it should be carefully examined and tested before being used on any product.

We evaluated three commercially available photoluminescent pigments, which were screen-printed on to cotton fabric, using a wide range of advanced microscopic and spectroscopic techniques. These included Scanning Electron Microscopy (SEM) and Electron Diffraction X-ray Spectroscopy (EDX).

The pigment particles showed a complex distribution of size with heterogenicity, as can be expected from a conventional production procedure. Particles with a size of 3 um were dominant in the violet pigment, while the blue and yellow-green pigments demonstrated particles with a sizes of 1-100 um.

EDX also revealed the presence of the rare earth element europium (Eu), a luminescent dopant in the yellow-green and violet pigments. The intensity of the Eu luminescence was largely affected by its oxidation state, being particularly sensitive to changes in the matrix.

In addition, luminescence decay curves were obtained for a relatively wide time span of 1 up to 180 min. They indicated that luminescence decay photoluminescent pigment was observed, irrespective of the concentrations used in each sample.

4. Non-toxic

Photoluminescent pigments are non-toxic and odorless. They are derived from either Zinc Sulfide or Strontium Aluminate and do not emit VOCs. They are also non-radioactive, as they do not react to Radium, Promethium and Tritium.

They can be used as additives in paint and coating applications. They also are effective for low-location emergency lighting and indication marks. They can be mixed with plastics, printing inks and paints to make them glow in the dark.

Strontium aluminate-based photoluminescent pigments are widely used as self-luminous safety items for fire and building egress identification, as well as extinguishing signs. They are non-toxic and reliable, and offer the longest glowing timeframe compared with other photoluminescent materials.

These pigments are based on strontium aluminate, an environmentally friendly alkaline earth aluminate that is non-toxic and harmless. They are used to create phosphorescent and luminescent materials, as well as glow-in-the-dark products for arts and crafts.

They are widely used as additives in paint and coating applications. This is because they provide good color and light quality and can last for an extended period of time when exposed to sunlight.

Their brightness is high and they are resistant to ultraviolet light. They can be used in a wide variety of media, including printing inks and paints, plastics and rubbers, ceramics and glass.

They are extremely stable and do not react with any organic or inorganic agents. They can be a great addition to any art or craft project. They are also perfect for creating anti-slip floors or finishing glasswork that needs a durable coating. They can be purchased online or in stores. You can also get small samples to try out before making a purchase.

5. Environmentally friendly

Photoluminescent pigments could be a solution to help combat the urban heat island effect. The urban heat island effect results in summer temperatures that are much higher than those found in the surrounding countryside. Luminescent materials can help to lower the temperature of buildings and pavements, by reflecting light back to the surface rather than emitting heat.

A photoluminescent pigment is a powder which glows after absorbing various visible light under 450 nm. It can be used as an additive for transparent media such as coating, printing ink, paint, plastics, printing paste and ceramic glaze to enable the media to glow in the dark.

The luminous powder is widely used in the fields of decoration, communication and transportation, military facilities, and fire emergency system etc. It is non-toxic, harmless and Eco-friendly. It can be recharged almost indefinitely as per its stable crystal structure.

It is a kind of rare earth strontium aluminate base glowing material, which has 30 times afterglow time than traditional zinc sulfide base luminescent material. It is free of radioactive elements and non-toxic, harmless and Eco-friendly.

This product is produced by using environmentally friendly production technology and has a good chemical stability, and can be used under 300W high pressure mercury lamp for 1000hr. It is a non-toxic and harmless photoluminescent pigment which has a high luminance under sunlight.

These products can be applied to all types of surfaces and materials which have an absorption or emission wavelength of 450 nm. They can be applied to plastics, rubbers, glass, ceramics and fiber. They can also be used for extinguishing and fire signs, self-adhesive vinyl, aluminum sheet, tape, stair nosing and helmet.