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Color Index is the most authoritative way to
search your exact requirement of Dyes and Pigments from the vast range of
colors available today. It is basically a compendium of dyes.
The chemical names of dyes can be very confusing and complicated. As a
result of this, the practice of using names that are descriptive has arisen.
In the U.K. the color Index was prepared by the Society of Dyers and
Colorists, while in USA it is done by American Association of Textile
Chemists and Colorists. With the advent of the System of Color Indexing,
many of the confusions associated with the naming and colors of Dyes and
Pigments have been effectively sorted out.
Generally a dye is referred to by a simple name that is comprehended by
people who is working with them. Which we can say as a common name. But the
problem is that it is not uncommon for a dye to have names that are more
than one. For example take basic fuchsia which was earlier known as magenta.
Another example: light green, has also been popularly used to refer to dye
methyl green. Some of these names are historical or there can be cases where
in order to sell a single compound different manufacturers gave different
names, to avoid violating copyright or trademarks of each other.
What is a Color Index
Index is basically a compendium of dyes, that has a huge volume of data. It
was prepared in the UK by the Society of Dyers and Colorists. In the USA by
the American Association of Textile Chemists and Colorists. It is available
both in the book form, and on CD as well. In this reference book there is a
very specific system to identify individual dyes. A five digit number is
assigned to each individual chemical that is used as a dye. Consequently
individual dyes get identified with reference to their CI number only. For
example when specifying a dye for use in any staining method the CI number
must be always provided.
The color index also has a system to assign a specific name (CI Name) for
each of the dyes, to avoid any confusion regarding chemicals. The name given
is totally based upon the dye's mode of behavior, base color and action.
This is followed by a number. To give an example, the CI name given for
chromoxane cyanine R (CI 43820) is Mordant Blue 3. Thus, the CI name
therefore gives a specific way to identify a dye. Although the CI name is
used less often than the CI number, the CI name is as useful in identifying
a dye for a particular staining method.
The following table illustrates the use of the Color Index for yellow
|C.I. Generic Name
||Bright greenish yellow
||Lemon yellow shade
Features of the Color Index
- Detailed record of products that can be found in the market is put
under a Color Index reference. For each product name there is a listing
of the manufacturer's name, principal usages, physical form, and
comments to help the customers. This format has been devised after
taking into confidence the coloration industry (including prominent
manufacturers, users, CPMA and ETAD).
- Colorants get listed in the Color Index strictly in accordance with
the system of (a) Color Index Generic Names (b) Color Index Constitution
- Around 27,000 individual products are listed under a total of 13,000
Color Index Generic Names.
- Chemical structures that are depicted is strictly in accordance with
the results obtained by modern researches on molecular conformation.
- Popular format has been devised with an unique 'fingerprint' concept.
- Part 1 of the information gets freshly confirmed with suppliers and
manufacturers. Part 2 of the information is either confirmed freshly
with suppliers and manufacturers or is depicted as "carried over
from the previous edition.
Application of Color Index
- Textile manufacturers.
- Paint manufacturers as well as suppliers.
- Colorant users, suppliers and manufacturers.
- Manufacturers and suppliers of Plastics.
- Testing labs, Libraries, academic institutions.
- Producers of Printing ink along with suppliers.
Highlights of the Color Index
The following three tables highlights major
information regarding the Color Index:
- Part 1 Dye Groupings:
- Natural Dyes and pigments
- Ingrain Dyes
- Azoic Diazo components
- Azoic Coupling components
- Oxidation Bases
- Optical Brighteners
- Intermediate Products
- Reducing agents and Developers
- Each group of Dyes is subdivided into Violet, Blue, Green, Yellow,
Orange, Red, Brown and Black.
- Manufacturing methods
- Structural formula (if known) of Dyes
- References (literature and patents)
- Abbreviations of manufacturers' names
- Generic names
- Commercial names
- Color Index is able to provide dye or pigment with 2 reference
numbers on the criteria of
- Coloristic aspects
- Chemical classification:
- The first one is the area of application and technique of
coloration=>the C.I. Generic name.
- The second technique is the one that is known as C.I.
- There is also provision of listing all the commercial names.