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ultra-fine Glow in The Dark powder

TABLE OF CONTENT

1. What’s the Ultra-Fine Glow in the Dark Powder

Luminous powder with a particle size range of 2-3 microns to about 10-15 microns is generally considered to be Ultra-Fine Series. 

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2. Available Applications

This range of luminous powder has tiny particles and is suitable for some production processes or products with special structures that have strict requirement of particle size. For example:

  • Super-thin coatings or super-thin substrates: Such as tens-of-microns coating layers, or straws.
  • Super-fine nozzle diameter: Such as spray gun nozzles with a diameter of 0.1-0.2mm.
  • Super-fine cables or silk threads: Such as filaments with tens-of-microns, or even finer diameter.
  • High-precision printing processes: Such as flexo printing, gravure printing, offset printing, etc.

3. Available Colors

Yellow-Green and Blue-Green. They appear yellowish-white (slightly yellowish-white) in daytime, and emit yellow-green and blue-green light in the dark.

ultra high yellow-green-blue-green-color-cart

  • Why are there only these two colors?

Ultra-Fine Series store fewer photons and have weaker brightness. Yellow-Green and Blue-Green are the two colors with the most outstanding luminous brightness among all colors, which can compensate for the influence of fine particles on brightness to the greatest extent. Other colors (such as Sky-Blue) have lower brightness. When their particles are made into ultra-fine range, its luminescence will be further reduced, resulting in fewer application areas.

4. Ultra-Fine Series Category

GlowUp®
Series		 Glow Color DMAX D90 D50 (average size) Brightness
(10min)		 Paint & Ink Plastic & Resin
Spraying Screen
Printing		 Gravure
Printing		 Flexo
Printing		 Offset
Printing		 Extrusion Drawing
YG Yellow-Green 18μm 10±2μm 6±2μm 181 ● ● ○ ● ○ ● ○
23μm 16±2μm 9±2μm 155 ● ● ○ ● ○ ● ○
37μm 10±2μm 6±2μm 102 ● ● × ○ × ● ○
37μm 20±5μm 10±2μm 260 ● ● × × × ● ○
47μm 25±5μm 12±2μm 235 ● ● × × × ● ○
YGH 47μm 25±5μm 12±2μm 198 ● ● × × × ● ○
BG Blue-Green 37μm 25±5μm 12±2μm 230 ● ● × × × ● ×
60μm 30±10μm 15±3μm 230 ● ● × × × ● ×
● Recommended ○ Possible × Not recommended
Testing conditions: DIN 67510
D65 light, 1000LUX, charging 5min

5. Special Properties of Ultra-Fine Series

There are some special properties for Ultra-Fine Series types. Please pay attention to the following matters:
  • Lower brightness
There is a physical property of luminous powder is that, the smaller the particle, the lower the brightness. The reason is smaller particles can only absorb limited light, so its brightness is lower than that of conventional particle luminous powder (For more information, please refer to the relationship between particle size and brightness).

Therefore, it is recommended to choose Ultra-Fine Series only when conventional particles cannot meet production requirements.

  • D90 and Dmax are more important than D50 (Average Partical Size):
When checking TDS for particle sizes, the most critical reference items are D90 and Dmax, because these two data represents the situation of large particles in the particle group, and determine whether this particular type can be used smoothly. The commonly used D50 (average particle size) is not recommended as the main reference item here.
  • Communication is important:
We have detailed particle size classification for Super-Fine series according to different terminal applications and production conditions. As most of these applications have strict requirements for the particle size of luminous powder, we recommend to communicate with us upfront to ensure precise product matching.

6. Production and Particle Size Stability Guarantee

  • Self-designed Production Process

The particle size classification of conventional luminous powder is carried out by screening with a sieve. Its finest type can reach about 20 microns. However, due to the extremely small volume of ultra-fine particles, screening with a sieve is prone to causing mesh clogging.

We have conducted independent design and customized the production equipment. After multiple tests we determined the specific production process and undertook precise resolution technology to distinguish the particle size range to achieve high-precision particle size control.

  • Particle Size Stability Control

In the application of Ultra-Fine Series, the compatibility between particle size and the product system, as well as the subsequent stability, are important factors for the production of end products—especially the precision of large particle control.

We use high-precision laser particle size dynamic analysis equipment to monitor and detect particle size distribution in real time, to ensure that the particle size of the luminous powder meets the customer’s technical requirements. At the same time, it can more effectively maintain the high consistency of particle size between different batches and provide customers with stable products.

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