Digital versus Offset Printing Services in Pakistan

Offset printing is a form of printing where the inks are cured through exposure to a UV-LED light. This process changes the performance of the inks on the paper.

Digital Printing Vs Offset Printing

Digital printing and offset printing are both great ways to produce high quality printed materials. It is important to choose the right printing method for your needs, especially if you are on a budget. Here's a look at the pros and cons of each method.

In terms of price, digital printing is usually cheaper. Offset printing is more expensive in the beginning, but as volumes increase, prices plummet. The unit cost can also depend on the print medium. A digital printing press can handle smaller sheet sizes than a comparable offset printer. This may be the case for art-gala invitations, for instance.

Offset printing uses a more complicated process to create the finished product. Firstly, the design is laid out on an aluminum plate. Afterwards, it is transferred to the inkjet roller, which is coated with a water-resistant ink. Once the ink dries, the design is printed onto the paper. A digital press can also print on 18 point stock, while an offset machine is limited to 12x18.

Offset Inks Are Formulated To Change the Performance of the Ink on the Paper

Offset inks have a wide range of uses. They are used for printing on many different surfaces. Some offset inks are also designed to be water-repellent and UV-curable. The materials that are used to make these inks can vary, but they are usually made from pigments, ink additives and vehicles.

These inks have different properties that change how they perform on paper. For example, an ink that is fast-drying is useful for a high-speed rotogravure press. Another type is designed to produce a strike-through effect.

When printing on hard paperboard, inks must be abrasion-resistant and fast-drying. Quick-set inks use a resin-oil-solvent vehicle to achieve a fast-drying process. However, other inks may contain water repellent fluids or vegetable-based oils.

Lithographic inks are a mixture of pigments, a binder and solvent. Lithographic inks are cured with oxidation or polymerization. This process sets the ink and binds it to the substrate. Lithographic inks can be used for many different types of paper and are commonly used in the metal printing and letterset industries. Inks are also available for the web offset lithography industry.

Offset Printing Presses Can Print Up To 18,000 Sheets per Hour

Offset printing is an effective way of producing a high-quality and colorful image. Depending on the size of the print job, an offset press can print up to 18,000 sheets per hour. This is one of the fastest printing technologies available and it is also quite cost-effective.

There are two types of offset printing presses: web and sheet-fed. The first uses rolls of paper, and the second runs individual sheets in various sizes. Both technologies are extremely fast. A web press can print 50,000 pages or more per hour.

Sheet-fed presses are generally smaller in size. They can print a variety of products, including business forms and promotional posters. Their electronic controls ensure a crisp line and rich colors.

Modern sheeted presses also have a shorter setup time. Some models have a perfector cylinder, which allows the pressman to print both sides of a sheet in a single pass. Waste sheets are also used for make-ready, limiting the amount of paper that is used.

Offset Printing Inks Cure When Exposed To UV-Led Light

UV-LED radically curable offset printing inks are used for security document production. They can be applied by a range of printing processes, including offset, roll-coating, and inkjet. The inks may include photo initiators, extenders, and anti-settling agents.

Photo initiators are chemicals that initiate a chemical reaction in the ink. The reaction is primarily a polymerization process of the ink matrix. However, it can also be a re-emitting of electromagnetic radiation at a lower frequency.

In this case, the luminescent material can be a luminescent organic compound. Preferably, a composition can contain one or more luminescent materials in a ranging from 1% to 20%. Some examples of luminescent compounds are: phosphorescent pigments, alpha-amino ketones, thioxanthones, aluminosilicates, and fluorescent pigments.

Fluorescence of printed layers was evaluated using the method described below. For each layer, fluorescence intensity was calculated from the intensity maximum of the fluorescence of a blank substrate. This was then converted to the corresponding fluorescence intensity of the front side.

UV-LED radically curable offset printing was prepared by combining a plurality of radically curable (meth) acrylate compounds, a variety of amino-containing compounds, and a photo initiator. These ingredients were then ground on a three-roll mill. After a period of curing, the inks were ready for testing.