Flexo: UV inks (UV)

UV inks are particularly used in flexographic printing to plastics and metal complexes due to their characteristic of having becoming an instant drying the liquid into a solid inks, thus avoiding problems such as repainting and providing greater physical resistance and chemical.

COMPOSITION OF UV INKS
• pigments
• monomers
• oligomers
• photoinitiators (radicalic and cationic)
• additives

CLASSIFICATION OF UV INKS
Depending on the type of photoinitiator using, Water Based Flexo Ink in India can be divided into radicalic or cationic.
• Radicalic: the polymerization process continues even turning off the light until they solidify, are the most used.
• Cationic: need of UV light at different stages to dry or polymerize, the process ends when the fold of UV light.

To lower the intensity in these inks varnish is used.

PROCESS polymerization of UV inks ( Water Based Flexo Ink in India )

Oligomers combined with the monomers forming the binder or ink vehicle, ie tranport serve pigments. As we already know,UV inks are formed by the above components more photoinitiators and possible additives, when these photoinitiators react to UV light polymerization reaction, thus activates the binder (oligomers and monomers) harden forming a solid ink film and dried.

Flexography: water-based inks

The main application of this type Water Based Flexo Ink in India is mainly in cellulose supports and certain plastics.
mainstays
• corrugated board: kraft, coated, recycled
• paper: glossy, coated, paraffin, cellulose, coated
• polyethylene: sacks and bags

COMPOSITION
• pigments: must be appropriate because the pH of these inks influences them
• resins: acrylic resins are used
• Solvents: -5% paper and 10% to 15% plastic
• additives alkalizing (solubilize resins as amines) and defoamers (antifoaming has the characteristics of having low voltage surface, easy to extend and partial insolubility in the medium)

CONDITIONS REQUIRING AN INK WATER
- Stability stock
(For virgin inks: stock of five months for diluted inks: stock 7 days)
- Extensibility
(Dissolution of 19% to 22 "for work in machine)
- Good rub resistance
- Good transfer of the support cliché
- No foaming machine
(Problems that can be found are: excess paper fibers, not suitable defoamer emulsion or air introduced by the machine itself)
- That are parafinables in certain cases
- quality
- colorful


ADVANTAGES OF Water Based Flexo Ink in India
• reduced pollution, which is a low cost
• reduced danger

PROBLEMS water-based inks
• slower rate of drying
• higher surface tension
• less resistance to heat than nitrocellulose
• less bright than solvent-based nitro, they are duller
• may have trouble foaming
• cleaning of the elements involved in the process must be appropriate and be made immediately.

Flexography

Flexography: flexographic inks
Flexographic inks are liquid and consist of several elements of different nature.
The main types of flexographic inks are:
-the solvent-based inks
-the water-based inks
-the UV inks

An important feature of the Water Based Flexo Ink in India flexographic inks is that they are transparent and to give them opacity should add white.
Like other inks are composed of resins, dyes (pigments / dyes), solvents and additives.

THE COMPONENTS
• The resins may be natural or synthetic; the most commonly used solvent-based inks are polyamides (solvent: alcohols), nitrocellulose
(Solvents: esters and alcohols) and polyurethane (solvents: esters and alcohols); for water-based inks are used water-soluble acrylic (Solvent: water).
• The pigments and dyes provide color. Their difference is that the dyes are dissolved and dispersed pigments.
• Solvents have the following functions: perfectly dissolve the resins, have the ability to evaporate and keep the viscosity of the
inks. We can distinguish three types of solvents: the so-called true solvent, thinner or accelerants and retardants (ethoxypropanol and methoxypropanol).
To handle a solvent-based ink is required a mixture of 80% alcohol (solvent) and 20% ethyl (diluent).
The main known solvents are: alcohols, esters, hydrocarbons, ethers, glycols, ketones.
• The additives impart certain properties to inks such as resitencia rub or higher brightness, etc. The main additives include waxes,antioxidants, plasticizers, defoamers, surfactants, adhesion promoters, other.
• The varnish is the result of the dissolution of the resins with the solvents and acts as the pigment vehicle.
Water Based Flexo Ink in India is to ensure high standard production, these products are manufactured by using quality assured base materials .

PROPERTIES
The main properties of the inks are given by qualities such as:
-the viscosity (22 ", Ford 4, 20)
-color
-intensity
-tonality
-brightness
-power covering
-cleaning tone
-reología: viscosity, resistance, tack
I -Drying ...

* If the data measuring the viscosity of an ink do not include temperature, it stipulates that it is 21º C.

* Remember that there are two types of viscosity: the static viscosity and dynamic viscosity, viscosity measurements are performed with a viscosity dynamic, ie moving the ink to be homogenized.

INKS

1. INTRODUCTION

1.1. WHAT IS THE INK?
The inks are substances applied to a support, the image reproduced on this printer form.
1.2. COMPOSITION OF INK
In general all inks have a solid and a liquid phase.
The solid phase is discontinuous and form pigments, while the liquid is a continuous phase more or less viscous, called vehicle, varnish or binder.
Substances that give color
The pigment is responsible for the color of the ink and the rigidity and a certain extent of viscosity. Also give color dyes inks and flexographic inks see in. Water Based Flexo Ink in India .


Vehicle
The vehicle is responsible for printability properties as viscosity and shot (later study).
additives
Additives are substances added in small proportions, give the ink certain characteristics according to the needs of the printing system and / or support.
1.3. A LITTLE HISTORY
Printing inks themselves, arise with the invention of printing (1450).
By the mid-third century, the Chinese used printing inks with carved wooden blocks to give relief to the image areas.
A Europe arrives in the Middle Ages.
With the invention of printing, both the ink and the paper needs become unavoidable.
At first water-based black inks they were used but they were short-lived.
The ink happened to be manufactured by the same print shops and composition of professional secrecy was part of the printers. They began to use vegetable oils such vehicles.

In the late seventeenth century proliferate ink manufacturers to not cope printers themselves with market demand.
In the late eighteenth still they continued to be used almost exclusively those based on linseed oil and rosin, with some additives inks; but already they are beginning to produce new pigments giving a wider range of printable colors.
In the late nineteenth born printing systems based on liquid inks Water Based Flexo Ink in India (Flexo and Gravure) and begin to manufacture inks for volatile solvent evaporation drying.

The first solvent used was aniline.
In the twentieth century advance knowledge of different printing systems and therefore most suitable for each synthesized in the laboratory raw materials are obtained.

1.4. CLASSIFICATION OF INKS
Depending on the composition of the inks, these are classified as:
- Inks fats
- Liquid Inks
- UV Inks
2. GENERAL COMPOSITION INKS
2.1. PIGMENTOS
insolubles ground to form a fine powder capable of dispersing in the vehicle.
They are responsible for giving color to the ink.
Generally the pigments used are of organic origin although synthesized in the laboratory.
According to the manufacturing and ink printing method and pigments or other (contact with water, oils, alcohols, fats, soaps, etc.) are selected.
Generally pigments are required to give the hue, lightness, intensity, etc. and are stable to chemical and physical agents.
The pigments are classified according to their color: black, white and colored.
2.1.1. NEGROS
They are most commonly used. The best known are those produced by the incomplete combustion of some liquids or petroleum gases and carbon blacks called them. They are usually retouch with small amounts of blue.
2.1.2. WHITE
Among them are two: White opaque white and transparent.Opaque surfaces are used to cover:
- Are mixed with other pigments to give greater opacity or to obtain pastel colors.
- They usually give problems in offset printing
- The most frequently used are inorganic opaque white such as Ti O2, ZnS, ZnO and SBa.
Transparent not reflect light as they let pass through:
- They are used to reduce the color and lighten the tone of other inks.
- The most used are: Hydrate of alumina, magnesium carbonate, calcium carbonate and Solid white.
2.1.3. COLORED PIGMENTS
Inorganics:
- They have little intensity and little tinting.
- Is little used and the most common are: Yellows chromium, molybdenum orange and red cadmium.
organic:
- They are usually prepared by mixing synthetic various products.
- Dan greater grain fineness, cleanliness of tone and intensity.
- They are more expensive than inorganic.
- Currently between 30% and 40% of those sold are colored inks and that% tends to rise.
2.2. DYES
- Unlike the pigments, the dyes are soluble in the ink vehicle.
- Dan more transparent inks.
- They are used to make liquid inks
2.3. OILS
They are divided into two main groups: mineral and vegetable.
2.3.1. MINERALS
- Come from the heavier fractions of petroleum distillation.
- They are divided into light, medium-duty and heavy as its boiling point.
- They are more dangerous to health because they may contain PCA (polycyclic aromatic-benzopyrene) with cancer risk.
- They can be refined; but much more expensive.
- They are the most used primarily in black inks and especially newspapers, due to its low cost. Dan unstable to heat and generally printing inks.
2.3.2. VEGETABLES
The most commonly used are flax (linseed), soya, sunflower, rapeseed and some seeds like mustard.
They give higher strength and quality to the inks and do not present toxicity problems.
The US uses 80% vegetable oil-based inks, even for black inks.
They have the disadvantage of being 25% more expensive than minerals.
In Europe and in particular Belgium, 80% of its daily use vegetable inks throughout production, both color and in black.
Another reason for using vegetable oil-based inks, is the protection of the environment.
In some US states require newspapers to respect environmental laws (1990): why can not emit volatile organic waste to the atmosphere. In addition more and become independent oil and solidarity with farmers in the country.
Vegetable oils can be classified according to their degree of polymerization, in blotters (which polymerize rapidly on contact with air), semi-drying and non-drying.
A classic example is the linseed oil according to time and the cooking temperature is achieved having a viscosity or another and which together with various resins used in coatings drying fast drying inks are achieved.
2.4. RESINAS
Together with oils, forming ink varnish.
Provided the shot (stickiness) to the ink.
They may be natural, such as pine rosin derivative and synthetic.
The varnish generally obtained by dissolving 140 to 190ºC of:
a) hard resins as rosin and phenolic derivatives formed, which improve the brightness, oil retention and promote drying.
b) the Gilsonite, deep black and is used for inks that color only.
c) the soft resins, which are synthetic, derivatives formed by alkyds (polyesters vegetable oils), and are more fluid.
2.5. SOLVENTS
They are organic liquids except for water.
Solvent missions are:
a) Dissolving the resins.
b) Evaporate to progressively without drying in the cylinder, yes do it in the holder.
c) not damage the cylinders of the machine.
d) Be compatible with the medium to be printed.
An example of gravure ink might be: 25% resin, 35% ethyl acetate (true solvent), 30% ethyl alcohol (diluent favors evaporation acetate) and 10% methoxypropanol Water Based Flexo Ink in India (retardant used in flexo)

Solvents used in flexographic inks:
- Alcohols
- esters
- Glycol Ethers
- Glycols
- Water
- Others
2.6. ADDITIVES
They are substances added in small amounts, confer on the different ink characteristics that make it suitable for printing types.
The manufacturer are added to adjust the ink to the printing system and the use that is going to give them; or the same printer uses the machine level to modify them slightly. blotters Accelerate oxidation and polymerization reactions.
Usually (like detergents) salts:
Cobalt. Dry surface
Lead. Dried in background
Manganese. Dry mass
Antisecantes or drying retarders
Prevent oxidation mass. Usually sprays and are made based on polyalcohols. Prevent the formation of skin in the ink or ink system.
They can be used by both the manufacturer and the same printer to the machine stops.
Antifrote waxes or pomades
Get a sliding effect on the printed surface to withstand subsequent handling.
Often complex polyethylenic.
anti-set
Avoid repainting. They are made based on starches which oxygenate the printed surface to increase the speed of ink set.
Its use is reduced to 3-5% of the total mass of the ink because it reduces print quality.
Correctors viscosity and shooting
Diluents are smoothed viscosity and ink tack.
They are made based on oils and thickeners.
miscellaneous products
Other substances are added depending on the manufacturer of certain printing problems that you may encounter or the end use of the form.

Water-based flexo ink formulation design elements

Research and Exploration 51 185 a Water Based Flexo Ink in India non-flammable by the concept of Water Based Flexo Ink in India and water-based emulsion of organic polymer resin paint solvent containing water and related physical and chemical addition processes by mixing an aqueous ink is mainly a non-volatile organic solvents not the ink manufacturers and operators of health and other characteristics of the atmospheric pollution as a new water-based ink printing ink without solvent inks certain hazardous substances in pressure can damage residual contamination of packaged goods and improving overall environmental quality water-based flexographic inks water based flexographic names of two ink formulation technology based on a classification method derived based on ink through print and the ink drying mechanism.

Aqueous binders of Water Based Flexo Ink in India and salt mechanism aqueous binder basically divided with water-soluble binders in three categories: a colloidal dispersion polymer emulsion water dilutes the ink industry is currently mainly in feed or dilute many polymer-type connector, the original is not soluble in water or in water only partially soluble, soluble in water, only adding an acid or base, are dissolved in water due to the ionization Typical examples polyacrylic and polyamide are the pH levels of anionic and cationic aqueous electrolytes, these materials and their viscosity stability flocculation dispersion closely related contains a certain number of strongly hydrophilic groups such as carboxyl and the like, but these polar hydroxyl groups on the molecular chain of the water-soluble polymer

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Creatively colored tees are fabricated by the procedure of tying and coloring fabrics at better places to give an exceptional impact. The fundamental accentuation in making an awesome look is on tying the fabric material in the right way. There are fundamentally 5 unmistakable styles of doing as such. How about we investigate them. Satish Chemicals for Basic Dyes in India, Pigment Emulsion in India, Solvent Base Inks in Cape Town, Solvent Base Inks in Durban, Flexographic Inks in Africa, Basic Dyes in Africa and Flexo Inks in Africa.

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