The classic "glow in the
dark" or phosphorescent pigments consist of very fine crystals
of zinc sulfide. Copper is added to the zinc sulfide as an activator.
This allows the crystals to absorb light and slowly emit it over time.
The slow emission is called phosphorescence.
Products:
UMC Phosphorescent pigments, in addition to the
natural colors, are available in a range of daylight fluorescent
colors. All of UMC's phosphorescent materials are non-toxic and
non-radioactive. Our product range is as follows:
| 6SSU is the basic phosphorescent
pigment. This material has a light yellow (natural) body color and
a yellowish green afterglow. 6SSU is designed to give the brightest
and longest afterglow. Six colored phosphorescent pigments (the GSS
Series) are also available. These are manufactured using a proprietary
process which combines 6SSU with daylight fluorescent pigments. This
result is a pigment with a distinct daylight body color and a variety
of bright emission colors.
GSR is a recently introduced yellow emitting (glowing) pigment
also consisting of very fine crystals of zinc sulfide. GSR is activated
with small quantities of copper and manganese bound to the molecule,
causing the "glow in the dark color" to shift to yellow.
The major application of GSR is as a base pigment to effectively
improve the "glow in the dark" emitting colors of yellow
and orange daylight colored phosphorescent pigments. For example,
GSR 115/2 Orange which has a bright orange afterglow has been specially
developed for Halloween. GSR 115/2 Orange is shaded with a heat
resistant fluorescent pigment so it can be used for plastics as
well as general ink or coating applications. |
