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What are pigments?
Pigment is the natural coloring matter of animal
or plant tissue. Pigments are used for coloring paint, ink, plastic, fabric,
cosmetics, food and other materials.
What are hinges?
Hinges are made of special archival tape, linen,
or fine Japanese paper. With pressure sensitive tapes, prints cannot be
glued or taped directly to a backing and for this purpose, hinges are used.
The methods used for obtaining hinges are non-acidic, reversible adhesives,
How does particle size affect a pigment's dispersibility?
he sizes and shapes of particles of pigments have
great impact on the colors of these pigments. But, these pigments are
available in cluster form instead of individual form. The cluster pigments
also effect the tinting strength and grind of these pigments.
Many different mechanisms are there, which hold the pigments together as a
clusters. The most common mechanism is the soluble materials, and these
materials cement pigment particles together in the drying process. When the
sizes of the pigments particles start to decrease, theirs surface area also
decreases and consequently, the electrical charge in these pigments
increases. This increased charge in the pigment particles make them more
What are the lightfast properties of the pigments?
The resistance characteristic of pigment against
the fading after exposure to sunlight, is called as lightfast property of
What are Pigment Sticks?
Pigment Stick is an oil stick that transform oil
painting into a whole new experience. These sticks consist of linseed oil,
natural beeswax, and pigments. Generally, pigment sticks are highly fluid
and very smooth. Sometimes, these sticks are also referred as Oil Sticks.
What is the meaning of Luminescence?
Luminescence is emission of light by a substance
not resulting from heat; it is thus a form of cold body radiation. It can be
caused by chemical reactions, electrical energy, subatomic motions, or
stress on a crystal.
What is the meaning of Fluorescence?
Fluorescence is the emission of light by a
substance that has absorbed light or other electromagnetic radiation of a
different wavelength. It is a form of luminescence.
What is the meaning of Phosphorescence?
Phosphorescence is a specific type of
photoluminescence related to fluorescence. Unlike fluorescence, a
phosphorescent material does not immediately re-emit the radiation it
What is the meaning of Brightness?
Brightness is an attribute of visual perception
in which a source appears to be radiating or reflecting light. This is a
subjective attribute/property of an object being observed.
How does TiO2 provide opacity?
When all of the visible light that falls on a
surface, is scattered, then only opacity is appeared. Titanium dioxide is
considered as an efficient light scatterer. When there is enough pigment of
TiO2 in an object or a film, only a small amount of light will be absorbed
by the pigments or polymer and rest of the light will be striked off. The
striked off light will be scattered outward and the system will appear as
opaque and white.
What is the relationship between Phosphorescence and Temperature?
The light discharged by a phosphor, hugely
depends upon the temperature. When phosphors are kept at high temperature,
then for a short period of time, these phosphorus rapidly discharge light.
But, when fully charged phosphors are kept at low temperature, then their
light discharging rate gets slower. That is why, whenever it is required to
test a matter, whether it is phosphorescent or not, the standard temperature
is taken. The standard temperature is 23° C.
Which chemical and physical factors affecting the light fastness of
pigments and dyes?
The lightfastness of the pigments and dyes do not
depend upon the pigment or dye, but depends upon the whole system. These
following factors affect the light fastness of pigments and dyes:
- Chemical as well as physical structure of these substrates.
- The concentration of dyes and pigments.
- The rate of diffusion of the volatile substances in the polymer.
- Distribution of wavelength of incident radiation.
- The atmospheric conditions like the humidity in the atmosphere and
percentage of contaminants.
- Distribution of wavelength of the incident rays.
What makes one grade of TiO2 different than another?
The particle size and surface treatment make the
grade of TiO2 different than another.
What are the prescribed directions while using dry pigments?
For methods of using dry pigments (or other
non-colored powdered additives) which require only as much mixing as is
possible with a brush. These methods can be applied for solvent or
water-based paints. It will not achieve the level of ground pigments, but
can suffice. Making the crude version of a pigment dispersion.
Manual grinding with a glass muller on a glass surface is recommended (see-
Grinding). Make a paste with dry pigment, water and disperse water for water
based paints or dry pigment, stand oil and disperse oil for oil base.
Will the organic color pigments stain the clothes or sheets?
The color organic pigments are not stains nor
these are dyes. So, if some stains arise in the clothes or sheets, then
after some time these can be washed-out completely from any synthetic
materials. These stains can be removed very easily.
What is a mixed metal oxide (MMO)?
MMO is a kind of inorganic pigment that contain
more than one types iron metals in their oxide crystal structure.
What is a CICP?
CICP are also a kind of pigments. These are
Complex Inorganic Colored Pigments.
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