(continued)
Afterglow period of 10 times current ZnS based phosphorescent pigments.
Activation by a wide wavelength band (200-450 nm) but best results are obtained with an activation energy under 350 nm;
Initial afterglow brightness of up to ten times that of conventional phosphorescent pigments;
Increase in luminescence and afterglow with longer activation time;
Excellent weather and light fastness;
Various colors;
Free of hazardous or radioactive substances;
|
LumiNova® |
LumiNova® |
Conventional |
|
| Chemical Identity | Strontium Oxide | Strontium Oxide | ZnS:Cu |
| Body Color | Light Yellowish Green | Light Blue | Yellowish Green |
| Avg Particle Size | 1.5 - 40mm6 | 1.5-20mm6 | 20-40mm |
| Excitation by | 200-450nm | 200-450nm | 200-450nm |
| Emission at (peak) | 520nm | 490nm | 530nm |
| Afterglow Brightness1 | » 300mcd/m2 | » 200mcd/m2 | 20-30mcd/m2 |
| Afterglow Extinction2 | >2,000 min | >2,000 min. | 200min. |
| Excitation Time3 | » 30 min. | » 30 min. | 4 min. |
| Light Fastness4 | > 1,000 hours | > 1,000 hours | 10-24 hours |
| Chemical Stability | Excellent (Except Water) | Excellent (Except Water) | Poor to Good |
| Specific Gravity5 | 3.6 | 3.9 | 4.1 |
(1) Brightness after 10 min., excitation
with a D65 illuminant for 4 min. at 200 lux.
(2) Time span necessary for afterglow
brightness to diminish to .32 mcd/m2 (100 times the human eye
perception limit)
(3) Time required for saturation with standard D65 illuminant at
200 lux.
(4) Time required for initial afterglow to drop by 20% after irridation with
300W high pressure mercury lamp (accelerated light fastness test)
(5) In powder form
(6) Depends on type of LumiNova® (different
particle sizes available)
Patented
by Nemoto & Co., Ltd. of Tokyo, Japan and exclusively available in North
America only from United Mineral & Chemical of Lyndhurst, New Jersey
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Photo Galleries: G1, G2
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Organic Inorganic Fluorescent
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