Do you know? There is a special pigment called "photoluminescent pigment", which is different from ordinary pigments. It can not only absorb light, but also store it and slowly emit light, even in a completely dark environment! Because of this superpower, photoluminescent pigment is used in many places, such as clothes, bags, and even safety signs!
What is photoluminescent pigment?
Simply put, photoluminescent pigment is a kind of pigment that "absorbs light and prolongs life"! Whether it is sunlight or light from a bulb, photoluminescent pigment can store it in its own "energy bank" and then slowly release it in the dark. This is why some luminous stickers can still be lit for a long time after turning off the lights, just like magic.
The word "photoluminescence" sounds high-end, but the principle is actually very simple: absorb light, store light, emit light. The reason why your luminous little stars can shine is because of this principle!
What is in photoluminescent pigment?
It is mainly a material called "phosphor", such as zinc sulfide or strontium aluminate. These chemical components get excited when they encounter light, and they start to perform after storing enough energy - they can still light up for several hours after turning off the lights! It lasts much longer than the short-term light of highlighters. (And most of them are gentle light green or blue-green, full of science fiction)
How long can photoluminescent pigment last?
Generally speaking, it can last for 8 to 12 hours! Especially yellow-green and blue-green are the most powerful, with high brightness and long-lasting. So occasions such as escape signs and luminous watches that require "super long standby" all rely on it to save the day.
What else can photoluminescent pigment do?
There are many uses! In addition to the cool designs on clothes and shoes, the more important thing is the safety field! For example:
Emergency indicator lights in buildings (rely on it to point the way during power outages)
Car dashboards, airplane escape signs (can be seen at a glance at night)
Even children's toys, artistic creations... Creative ideas that glow in the dark are all realized by it!
This thing is practical and fun! Next time you see something glowing in the dark, you'll understand - it's "photoluminescence" secretly working overtime - maybe it can even add some magical special effects to your own DIY projects!
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