Natural food colorant (pigment) is a kind
of edible pigment obtained by the natural resources. Mainly from animal and
plant tissues and microorganisms to extract pigment, and the colorants is in
the majority of plant. Natural Pigment has not only to the role of food
coloring, but also is a considerable part of Natural Pigment has the
physiological activity.
The advantages of Natural Pigments:
1. Most Natural Pigments are from animal
and plant tissue, therefore, generally on the high security to people.
2. Some Natural Pigment itself is a kind of
nutrients, has nutrition effects, some also have a certain pharmacological
effects.
3. It can be better able to mimic the
natural color, the color tonal is more natural.
The limitations of Natural Pigment in
application:
1. The solubility of it is small, it is not
easy to color uniformity.
2. The pigment concentration is generally
small, dyed the gender is poo, some natural edible pigment and food raw
materials produce chemical reaction and discoloration.
3. The fastness of it is poor, and greatly
affected by PH, oxidation, light, temperature and so on.
4. Because it has been extracted from
natural plants, sometimes affected by its coexisting ingredients or have their
own peculiar smell.
5. It is difficult for Natural Pigment to
color. Different colorant compatibility is poor, it is difficult to deploy a
arbitrary hue.
6. It is susceptible to metal ions and
water quality impact. Edible Natural Pigment is easy to occur in metal ion
catalyzed decomposition, discoloration or formation of insolubles salts.
7. The composition of it is complicated,
improper use of it is easy to produce precipitation, opacity, and the pure
product cost is high.
8. The products are quite different,
Natural Pigments are basically is a mixture of several components, but the same
colorant due to different sources, different processing methods, and the
ingredients are also different.
9. The properties of Natural Pigment are
less stable than the synthetic pigment, when we use it, we need to add
protective agents, and this have some adverse effects on the use of pigment.
10. In most cases, the cost of Natural Pigment
is much higher than the cost of synthetic pigment.
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