the main ingredients of this product are: strontium aluminate (SrO) · (MgO)
0.1 · Al2O3 (EuO, Dy2O3) 0.01B.
product density :3.4-3 .6 bulk specific gravity of between 1.5 to 2.5,
different models are different.
time required to stimulate somewhat different under different
illumination at 500-1000LUX the D65 illumination, the time required is
approximately 15-30 minutes, and the other different types of products
are slightly different.
light and strong UV light irradiation condition 200 hours no significant
product water soak 1 hour no significant change, then gradually
hydrolyzed, pale white body, lose afterglow characteristics. (Luminous
blue light and red light is another system, without changing the
luminescent properties of the soaking water.)
of relevant state departments, non-radioactive.
powder from 400 degrees Celsius brightness performance began to decline
after 600 decreased by more than 30% heat-resistant powder blue green
yellow-green powder is higher than 200 degrees.
earth photoluminescent pigments because of its long-lasting,
non-radiation characteristics are more and more accepted by the industry
and customers, but about the rare earth luminescent pigments brightness
problems are often puzzled in new customers, the manufacturers say can
clearly lit 10 hours, how a few hours out of sight, might think of a lie
is not a manufacturer or product quality problems, which may cause some
unnecessary misunderstanding. In this pair of glow in the dark pigment
brightness duration do simple resolution.
Typically photo luminescent
pigment brightness of the unit is cd/m2 (candela per square meter),
while the luminous brightness is generally mcd/m2 (milli candela per
square meter), we compare the brightness of the light on the common
The midday sun reaches 1 to
Day general indoor only 1000 ~
And our night lights generally
100 ~ 1000cd/m2,
Emergency lights brightness
requirements greater than 50cd/m2,
The new electroluminescent
signs, luminance only 20 ~ 100cd/m2,
brightness LED signs made of phosphorescent pigment does not exceed
10cd/m2, and the excitation light source is stopped the moment, the
brightness is only two minutes after 1 ~ 2cd/m2, generally 0.060 ~
0.0990cd one hour / m2, ten hours after General 0.006 ~ 0.010cd/m2.
Therefore, the observed brightness of photoluminescent pigments during
the day, due to the presence of ambient light (even in the darker dark
room, will be more than 1cd/m2), but due to the strong contrast of our
outdoor room, eyes feel very dark, and the environment observed, glow in
dark pigment is often observed in less than an hour or so to shine. If
you use a dark drawer or paper tube to observe what, then more than 10
minutes can not see the glow in the dark pigment shine. So why the
production of luminescent pigment manufacturers say can shine 10 hours
of it, because the human eye under dark conditions can be observed in
the full light is very weak as 0.00032cd/m2, but usually phosphorescent
pigment to the brightness of the light attenuation below time can reach
more than 10,000 minutes, which means you can continue to light 10,000
minutes (166.67 hours) theory the human eye can see. In order to explain
the brightness of the image of luminous pigment, photoluminescent
pigment in the early promotion of the time, said to be emitting 8 hours
10 hours, etc., and usually only last a luminous glow pigment ZnS
distinguish one hour or less open.
order to accurately express the universal application and test
equipment, and now gradually replaced by one hour data, due to the
larger cd/m2 units, so luminescent pigments usually mcd/m2 (milli
candela per square meter), generally one hour brightness are between 10
~ 100mcd/m2, different levels of granularity and brightness are not the
same product, the greater the higher the brightness because the luminous
particle size, particle size but big bad performance, so in the same
light conditions, the more granularity little more upscale products, and
of course the price is more expensive, in order to save material costs,
usually coarser product selection to achieve high brightness products
under the process conditions allow.
Photoluminescent powder from the use of point of view, no need
usually 8-10 hours lighting time, fire requires 90-120 minutes. But
under dark ambient conditions, at 8-10 hours, or even longer, the human
eye can perceive the luminous powder is still weak, and play a role in
the lighting instructions. The reason why the rare earth glow in the
dark powder called photoluminescent pigment, is as mentioned above, is
less than one hour of continuous light-emitting ZnS glow pigments
(short-acting glow powder) to distinguish.