- Created: 10-01-22
- Last Login: 10-01-22
User Profile
Vdef25rty
Aluminum
Paste, also called
Floating Aluminum Paste or
Aluminum Pigment Paste is a mixture of solvent or
water and aluminum pigments with particle shapes and sizes that have
been manipulated through a milling process to create aesthetic
properties. Both chemical solvents and water can be used as a liquid
when producing aluminum paste.
Aluminum paste is a packaged metallic pigment or dust. Aluminum
pigments are used to create the metallic aesthetics found in a wide
range of paints, coatings and inks. Manipulating the particle shape
and size within the coating, ink or masterbatch (ink for Graphic Arts
and masterbatch for plastics) creates different effects. It is not
enough to simply add pigments to a paint or ink. The aluminum pigments
are combined with a dispersant comprised of solvent or water to create
a paste. Often, the Paste is referred to a slurry or a pigment slurry.
The reason for not using dry pigments is that dry pigments are not
typically used is for safety and easy handling. Aluminum flake and
dust are referred to as fines. These airborne fines can quickly spread
heat when ignited. If exposed to electricity, phenomena known as arch
flash will occur. The very dust used intentionally to aid rocket
boosters and pyro techniques, presents severe hazards as a machining
and thermal spray byproduct. Additionally, manufactures of coatings,
inks or masterbatched containing aluminum metallic pigments do not
want to create this hazardous dust during their production.
A variety of solvents can be used to create paste. While the solvent
used will depend on the end use, mineral spirit is common. Even water
can be used should the paste be needed for water based coatings. Water
based aluminum paste is also used in lightweight concrete. A water and
alkaline solution, mixed with aluminum, will give off gasses that
result in small air pockets within the concrete. The result is a
lighter concrete known as "aerated concrete." Generally,
Aluminum flake pigments can react with water. When the two are
combined, they create hydrogen. Hydrogen is a flammable and dangerous
gas if not properly handled.
Metallic Aluminum Paste are used in the paints
and coatings industry for both their optica effects as well as for
their functionality. Effect pigments are always lamellar (flakes) and
their particle diameter is larger than the one of color pigments. And
the Aluminum Paste is often made by
Aluminum
Powder like Atomized Aluminum Powder,
Spherical Aluminum Powder,
Aluminum Silver Powder and so on. While the particle size of
color pigments is in the wavelength range of visible light, the flake
diameter effect pigments is generally around 5-45 μm. And there are
many different kinds of Aluminum Paste like
Fine White Aluminum Pigment and
Sparkle Aluminum Paste.
In many cases the properties of metallic effect pigments can be
deduced directly from the production process. The gold bronze pigments
are dry milled in ball mills (Hametag process), but for safety reasons
aluminum pigments are produced almost exclusively in a wet milling
process adding white spirit (Hall process).The raw material -
atomized, spattered aluminum with a minimum purity of 99.5% according
to EN 576 – is milled respectively shaped to flake-like particles in
ball mills, filled with grinding aids (lubricant).
The milling parameters and the lubricant are determined by the
application for which the aluminum paste pigment is intended. The
pigment slurry is screened, pressed on filter presses and adjusted in
mixers to a ratio of 65% solids and 35% solvent. The final product can
be tailor-made for its later application by the addition of particular
solvents or additives to the filter cake.
Paste, also called
Floating Aluminum Paste or
Aluminum Pigment Paste is a mixture of solvent or
water and aluminum pigments with particle shapes and sizes that have
been manipulated through a milling process to create aesthetic
properties. Both chemical solvents and water can be used as a liquid
when producing aluminum paste.
Aluminum paste is a packaged metallic pigment or dust. Aluminum
pigments are used to create the metallic aesthetics found in a wide
range of paints, coatings and inks. Manipulating the particle shape
and size within the coating, ink or masterbatch (ink for Graphic Arts
and masterbatch for plastics) creates different effects. It is not
enough to simply add pigments to a paint or ink. The aluminum pigments
are combined with a dispersant comprised of solvent or water to create
a paste. Often, the Paste is referred to a slurry or a pigment slurry.
The reason for not using dry pigments is that dry pigments are not
typically used is for safety and easy handling. Aluminum flake and
dust are referred to as fines. These airborne fines can quickly spread
heat when ignited. If exposed to electricity, phenomena known as arch
flash will occur. The very dust used intentionally to aid rocket
boosters and pyro techniques, presents severe hazards as a machining
and thermal spray byproduct. Additionally, manufactures of coatings,
inks or masterbatched containing aluminum metallic pigments do not
want to create this hazardous dust during their production.
A variety of solvents can be used to create paste. While the solvent
used will depend on the end use, mineral spirit is common. Even water
can be used should the paste be needed for water based coatings. Water
based aluminum paste is also used in lightweight concrete. A water and
alkaline solution, mixed with aluminum, will give off gasses that
result in small air pockets within the concrete. The result is a
lighter concrete known as "aerated concrete." Generally,
Aluminum flake pigments can react with water. When the two are
combined, they create hydrogen. Hydrogen is a flammable and dangerous
gas if not properly handled.
Metallic Aluminum Paste are used in the paints
and coatings industry for both their optica effects as well as for
their functionality. Effect pigments are always lamellar (flakes) and
their particle diameter is larger than the one of color pigments. And
the Aluminum Paste is often made by
Aluminum
Powder like Atomized Aluminum Powder,
Spherical Aluminum Powder,
Aluminum Silver Powder and so on. While the particle size of
color pigments is in the wavelength range of visible light, the flake
diameter effect pigments is generally around 5-45 μm. And there are
many different kinds of Aluminum Paste like
Fine White Aluminum Pigment and
Sparkle Aluminum Paste.
In many cases the properties of metallic effect pigments can be
deduced directly from the production process. The gold bronze pigments
are dry milled in ball mills (Hametag process), but for safety reasons
aluminum pigments are produced almost exclusively in a wet milling
process adding white spirit (Hall process).The raw material -
atomized, spattered aluminum with a minimum purity of 99.5% according
to EN 576 – is milled respectively shaped to flake-like particles in
ball mills, filled with grinding aids (lubricant).
The milling parameters and the lubricant are determined by the
application for which the aluminum paste pigment is intended. The
pigment slurry is screened, pressed on filter presses and adjusted in
mixers to a ratio of 65% solids and 35% solvent. The final product can
be tailor-made for its later application by the addition of particular
solvents or additives to the filter cake.