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Longwave ultraviolet powders which are not soluble have much greater sunlight
and temperature stability than soluble powders. Typically, soluble powders
are organic whereas the non-soluble powders are inorganic, crystalline
structures. The Blue Wool index for our non-soluble powders is typically 8
or higher.
The drawbacks with non-soluble powders are:
 | Creating a liquid suspension is more difficult |
 | Colors are not as bright as the organic, soluble powders |
 | Liquid suspensions of non-soluble powders will leave a trace of powder on
the object. However, on porous materials such as paper, the powder may
be completely invisible. |
We make custom suspensions of our various non-soluble powders which can be
used like an ink. Making an ink using an inorganic substance is much more
difficult than making a simple ink using a soluble substance.
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