what is a pigment?

Answer 1

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A pigment is a material that changes the color of light it reflects as the result of selective color absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which the material itself emits light.

Many materials selectively absorb certain wavelengths of light. Materials that humans have chosen and developed for use as pigments usually have special properties that make them ideal for coloring other materials. A pigment must have a high tinting strength relative to the materials it colors. It must be stable in solid form at ambient temperatures.

For industrial applications, as well as in the arts, permanence and stabililty are desirable properties. Pigments that are not permanent are called fugitive. Fugitve pigments fade over time, or with exposure to light, while some eventually blacken.

Pigments are used for coloring paint, ink, plastic, fabric, cosmetics, food and other materials. Most pigments used in manufacturing and the visual arts are dry colorants, usually ground into a fine powder. This powder is added to a vehicle (or matrix), a relatively neutral or colorless material that acts as a binder.

A distinction is usually made between a pigment, which is insoluble in the vehicle, and a dye, which is either a liquid, or is soluble in its vehicle. A colorant can be both a pigment and a dye depending on the vehicle it is used in. In some cases, a pigment can be manufactured from a dye by precipitating a soluble dye with a metallic salt. The resulting pigment is called a lake pigment.

Answer 2

A pigment is a material that changes the color of light it reflects as the result of selective color absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which the material itself emits light.

Many materials selectively absorb certain wavelengths of light. Materials that humans have chosen and developed for use as pigments usually have special properties that make them ideal for coloring other materials. A pigment must have a high tinting strength relative to the materials it colors. It must be stable in solid form at ambient temperatures.

For industrial applications, as well as in the arts, permanence and stabililty are desirable properties. Pigments that are not permanent are called fugitive. Fugitve pigments fade over time, or with exposure to light, while some eventually blacken.

Pigments are used for coloring paint, ink, plastic, fabric, cosmetics, food and other materials. Most pigments used in manufacturing and the visual arts are dry colorants, usually ground into a fine powder. This powder is added to a vehicle (or matrix), a relatively neutral or colorless material that acts as a binder.

A distinction is usually made between a pigment, which is insoluble in the vehicle, and a dye, which is either a liquid, or is soluble in its vehicle. A colorant can be both a pigment and a dye depending on the vehicle it is used in. In some cases, a pigment can be manufactured from a dye by precipitating a soluble dye with a metallic salt. The resulting pigment is called a lake pigment.

Answer 3

Pigment-
1. Any coloring matter, as that of the red blood cells, hair, iris, etc.,
2. or the stains used in histologic or bacteriologic work,
3. or that in paints.
4. A medicinal preparation for external use, applied to the skin like paint,
5.or coloring agents used in paints.

Answer 4

Pigments are chemical compounds that have the ability of absorbing different wavelengths of the visible light spectrum, and reflecting other wavelengths that we perceive as color. Chemically, pigments are bio-molecules (carbon-based) and are primarily lipids (fats and oils). Chlorophyll, which you may be familiar with, is an important component of the process of photosynthesis, and gives to leaves their green color.

Answer 5

Coloring substance: a substance that is added to give something, such as paint or ink its color.
Pigments are often available in the form of dry powders to be added to liquids. Or --- Natural plant coloring: a natural substance in plant or animal tissue that gives it its color.

Answer 6

1. A substance used as coloring.
2. Dry coloring matter, usually an insoluble powder, to be mixed with water, oil, or another base to produce paint and similar products.
3. A substance, such as chlorophyll or melanin, that produces a characteristic color in plant or animal tissue.

Answer 7

Pigments float in water or any other liquid and they are what gives it color.

Answer 8

a color dye is known as pigment

Answer 9

In Plants- natural product-essentially a result of secondary metabolism. eg chlorophyll, carotenoid

Answer 10

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