Green (previously known as Phosphorescent Medium) is
a non-hazardous, waterborne acrylic polymer medium that
is formulated to emit a yellow-green glow after being
properly charged with a light source.
GOLDEN Phosphorescent Green is a water-based acrylic
medium that can be applied to various surfaces. The
unique pigment used in its formulation is characterized
by its ability to absorb and store natural and artificial
light. When the light source is removed (i.e.: when
the lights are turned off or the painted object is taken
into a dark area), a bright, greenish glow is emitted
for up to 15 minutes. The glow steadily diminishes as
the stored light energy is released.
GOLDEN Phosphorescent Green can be brush-applied
in the same manner as other acrylic paints. However,
there are certain guidelines the artist must follow
to maximize the intensity and duration of the glow.
The glow time is directly related to the thickness of
the applied medium, as well as the intensity, quality
and time of exposure to the light source.
Thin coats of Phosphorescent Medium will not produce
a long-lasting, glowing effect. In order to maximize
the effect, apply several layers of the medium until
maximum opacity1 is achieved.
To test the effectiveness of each coating,
and to later test which available light source works
best, make a test panel where layers of the medium are
- Begin by applying an even coating to a piece of
illustration board or other suitable substrate.
Allow to dry.
- Leave a section (1/10th of overall board) with
just one coat, and apply the next coat. Allow to
- Repeat this step until several coats of at least
5 different thickness are built up to produce an
opaque coating. Allow each layer to fully dry before
proceeding. The end result should look like "steps"
being built up as each layer is applied.
This test panel will show how many coats are needed
to give the maximum glow. The light source is equally
important for maximum glow.
Natural and artificial light sources can be used to
"charge" GOLDEN Phosphorescent Green. Light
sources rich in Ultraviolet (UV) are most effective.
Tungsten and Fluorescent lights will work, but some
sources can take longer than others depending on their
intensity (wattage). The fastest charge can result from
a good Ultraviolet Light, commonly referred to as a
"black light". The black light will also allow
a bright glow to remain constant if left on during viewing.
Infrared lights will not charge this product.
Use the test board with the different
layers of medium to check which source will work the
best for each use. Experiment with different types of
light and their proximity to the Phosphorescent Green.
Other Acrylic Paints.
GOLDEN Phosphorescent Green is not a true blending medium
like GOLDEN Polymer Medium. Mixing with acrylic paints
will substantially diminish the glowing capability of
the product. If colour is absolutely essential, the Fluorescent
Paints diminish the glow the least. They must still
be added very sparingly.
Any paints applied over the medium will
also inhibit the glow. Even a transparent glaze will
interrupt the charging capability of the medium.
Phosphorescent Green can be blended with
any of the GOLDEN Gloss Gels or Mediums. Experimenting
with different ratios of gel and Phosphorescent Green
will produce different appearances. Blending the medium
with GOLDEN Gels that are thick, such as Heavy Gel or
High Solid Gel, will allow a much thicker, one-coat
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- GOLDEN Phosphorescent Green
is not Lightfast2, meaning that the more exposure
to light it receives, the faster it fades. If an
object begins to lose the ability to charge, additional
coats may be applied at a later date.
- Black lights put near the
object can keep the glow appearance more constant.
Experiment with intensity of light and distance
of UV light to the object.
- An opaque, even coating can be used as a glowing
"chalkboard" with the aid of a flashlight.
Messages can be "drawn" and the duration
depends on how fast or slow the flashlight is moved
across the film.
- To hide the Phosphorescent Green during normal
viewing, apply the medium over a base colour that
is similar in hue and value. This will allow even
heavy coatings to be undetectable during normal
lighting. Using this technique will allow for "hidden"
messages or graphics to be put into an artwork
1Opacity - the degree to which a material obscures a
substrate or underlying paint layers.
2Lightfast - ability to withstand colour change due
to exposure to light.
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