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Our Brand Name : ALLOJET INKJET DYES
Inkjet Dyes or Salt Free Dyes
Inkjet Dyes are water soluble dyes, which are applied in the
Inkjet printers. The quality of an inkjet printing is very much influenced
by the physico-chemical properties of printing ink. Dyes for Inkjet ink
are a bit different from the usual dyes that are available for fibers.
This is because of the fact that they need to have high purity, and do
contain small salt and inorganic matters. Dye inks are prepared by
dissolving of the liquid colored dyes into a fluid carrier. This makes the
dyes easy to apply. When it is applied to a paper, the dyes are absorbed
very uniformly so they reflect light very evenly. As the printing is a
high precision job the inkjet dyes need to have superior quality in terms
of colors, physical properties, and stability. Inkjet dyes can also come
in the form of powders besides the usual liquids.
Few of the inkjet dyes that are available in the powder form along
with its characteristics are given below:
| CI Name |
CI Number |
Concentration |
Quality |
Characteristics |
| Reactive Red 180 |
181055 |
100.00% |
Salt-free/RO |
Magenta (standard) |
| Acid Blue 9 |
42090 |
165.00% |
Low salt |
Cyan (standard) |
| Direct Blue199 |
74190 |
175.00% |
Salt-free/ RO |
Greenish blue |
| Acid Yellow 23 |
19140 |
200.00% |
Salt-free/RO |
Red shaded Yellow (standard) |
| Direct Black 168 |
30410 |
165.00% |
Salt-free/RO |
Standard |
| Direct Black 19 |
35255 |
200.00% |
Salt-free/RO |
Standard |
Product Range
| Product Name |
C.I. No. |
CAS No. |
| Acid RED-1 |
18050 |
3734-67-6 |
| Acid RED-14 |
14720 |
3567-69-9 |
| Acid RED-18 |
16255 |
2611-82-7 |
| Acid RED-27 |
16185 |
915-67-3 |
| Acid RED-73 |
27290 |
5413-75-2 |
| Acid RED-87 |
45380 |
548-26-5 |
| Acid RED-92 |
45410 |
18472-87-2 |
| Acid YELLOW-36 |
13065 |
587-98-4 |
| Acid YELLOW-73 |
45350 |
518-47-8 |
Chemistry of Inkjet Dyes
It is essential to understand the chemistry of
inkjet dyes, because these dyes are indispensable today. Researches were
done at Helsinki University of Technology to understand the light fastness
of inkjet prints for the first time. They applied the Kerr gated resonance
Raman spectroscopy for this. In this process, the excitation wavelength was
used to selectively raise the Raman signals from the dye molecules of the
printing colors. It was found that the Kerr gate rejected fluorescence of
the dyes, inorganic pigments and the strong fluorescent optical brighteners.
The interactions between the dyes and the coating polymers were studied from
shifts in the Raman signals of the dyes. The light induced changes that took
place in the chemical structure of the dyes were detected as changes as a
result of the intensity of the Raman bands that corresponded to specific
chromophores in the dye.
Functioning of Inkjet dyes
Dyes that are generally used for inkjet printers
is charged to anionic, while cationic substances are used as a fixati for
the dye.
Inkjet print images uses a particular method of fixing the dye firmly for
making the prints durable when they are stored. Inkjet papers that has
cationic polymers, have a superlative effect in fixing the various dyes. As
the following diagram illustrates:
Selecting the right powder form Inkjet Dyes
- There must be the use of latest technologies like Reverse Osmosis in
the desalting process.
- Must possess a very fine particle size.
- The powder form inkjet dyes should have a very low salt content.
- The dyes must get easily soluble in water and other types of
co-solvents.
- Gives the right storage options.
- Must be Environment friendly.
- Last but not the least that gets easily converted into liquid "on
site"
Advantages of Inkjet Dyes
- Bright intense colors.
- Wide selection.
- Offers a wide gamut of colors.
- Stable and soluble.
Drawbacks of Inkjet Dyes
- The print is not as much thick as of a pigment based ink.
- There is a tendency for less stabilization.
- More damage prone to attacks of sunlight ozone and ultraviolet rays.
Comparison between Inkjet Dyes and Inkjet Pigments
From the point of view of the manufacturers:
| Inkjet Dyes |
Inkjet Pigments |
- As a result of sustained efforts over the years this technology
is now very well mastered in the industry. In fact, dye based inks
started long before the time that inkjet printers even appeared on
the market.
|
- The technology of pigment is comparatively difficult to master as
the problem of small size of the particles to create in large
quantities must be taken into account. As nano-sized particles have
to be manufactured that will be coated in a thin resin.
- This resin is used for protection of the pigment against external
chemical and mechanical attacks. This has a problem too as it also
helps in transportation of the particle inside the ink, through the
nozzles and finally onto the paper. Thus, it is quite clear that
these contradictory constraints make this technology a difficult
proposition to perfectly master.
|
From the point of view of users:-
| Inkjet Dyes |
Inkjet Pigments |
- The ink (dye based) is usually cheap though the manufacturing
cost is only one factor in ascertaining the selling price of inkjet
ink.
- Dye is usually fragile, when exposed to light and Ultra-violet
light, the colored molecules gets broken and loose its color. This
results in the prints to loose their original colors and fades
overtime.
- Ozone and several other common pollutants are also able to
chemically break down the color molecules.
- Drying time has a direct bearing with the drying time of the
solvent on the paper (often this leads to untimely closing of
nozzles, if the ink is set to dry very fast on paper). Consequently,
if the ink and its solvent is not quickly absorbed by the paper,
there is a risk of ink flow or paper deformation.
|
- The Pigment based inks solution gives longevity to. It is thus no
surprise that many printers are opting for such pigments.
- Degradation of pigments by pollutants or ozone is not that much,
the presence of the resin coating limiting it further.
- Color density is generally better, or easier to achieve than with
dye-based inks.
- However talking of limitations pigments shows tendency to promote
a defect called bronzing. When brightly lit or if lit with low
incidence, the print can show unpleasant metal-like reflections.
- Manufacturing costs are higher, therefore cost of the ink is
higher to the user.
|
Dyes for Water Based Inkjet Inks
Essential Features
For detailed information, product specifications & samples, please
contact us.
- Very low salt content (e.g. Chloride, Sulfate, Calcium and Iron all
below 50 ppm based on 100% dye).
- Excellent light fastness.
- High purity.
- High surface tension.
- Excellent tinctorial strength
- Brilliant and vibrant colors
Our chief products are:
- Cyan
- Magenta
- Yellow
- Black
Dyes for Digital Textile Printing
Essential Features
For detailed information, product specifications & samples, please
contact us.
- A low to medium salt content
- Fairly high surface tension
- Brilliant colors
- High light fastness
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