First of all, take out the luminous powder and put it on the table . Take a serious look to see if there are any impurities in it. It can be seen more clearly with a magnifying glass. Then I want to say that the size of the luminous powder particles is directly related to the brightness of the luminous powder,
The larger the luminous powder particles are, the brighter the luminous effect is, and the smaller the luminous powder particles are, the darker the luminous effect is. Therefore, when choosing the luminous powder, it depends on what industry you use, and whether there is a great demand for the particle size. If not, it is better to choose a thicker luminous powder so that the luminous effect is more obvious.
Again, the comparison of luminous powder: put several kinds of luminous powder with relative particle size on the black board or desktop (in this way, it's better to test in the full dark room or at night).
Put it under the sun light for about 10 seconds.
Then turn off the light to compare the brightness. Look at that light absorption effect, obviously, the good luminous powder is faster than the ordinary luminous powder, and the light absorption effect is very obvious.
After an hour, compare the brightness with that one.
The light with good brightness lasts a long time.
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