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Pearlescent Pigments
Pearlescent Pigments belong to the same group of
fluorescent and phosphorescent pigments. Pearlescent pigments are
special kind of pigments. These pigments are also known as Pearl
Pigments. The name Pearl has given to these pigments because they
possess pearl like shine, when these pigments are covered with any
metallic oxide out of mica slice. These pigments have high transparent
appearance, more smoother plane and higher refractive co-efficient than
other common pigments. These pigments simply look like flat powder.
Characteristics
of Pearlescent Pigments |
- Have high acid resistance capacity.
- Have high alkali resistance capacity.
- Can bear temperature up to 800 degree C.
- No spontaneous combustion nor support the combustion.
- Bad conductor of electricity.
- Have good light stability.
- Some products of these pigments can have the ability to resist
the ultra-violet radiation.
- Not harmful for human beings as these are used to pack materials
of food.
Shinning
intensity of Pearlescent Pigments |
"Multiple Reflection" process is used to
produce pearl like shine in these pigments. Based on this method,
Pearlescent pigments are mixed with greater transparent materials.
Sometimes, to get suitable light in the materials, these pigments are
mixed with transparent pigment or dye. Pearlescent pigments should not
be mixed with opaque objects or with such pigments those have better
coverage, because these pigments will affect the pearl shine. By adding
few carbon black powder (say 0.01%), the shinning effect of these
pigments can be increased.
Application
of Pearlescent Pigments |
The chemical, mechanical and thermal properties of
pearlescent pigments are excellent. Due to these excellent properties,
today, pearlescent pigments have universal applications. The products
get a new color quality through these pigments. These pigments are
completely safe for eatable purpose, hence, these are used for food
packing purpose. In toy industries also, these pigments are used. These
pigments are insoluble in water and commonly don't contain any heavy
metals. Therefore, these are considered as environment friendly. In
manufacturing of transparent as well as semi-transparent plastic
products, these pigments are used. The Pearlescent pigments are also
used in coating industries in a large extent. Any kind of monochromatic
coating mixing is used with these pigments and pearl light coating is
produced. These pigments are also used in printing industry.
Printing-ink having of different color and luster are manufactured with
these pigments.
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