Print Methods.

Four main Print Methods

- Lithography.

Lithographic printing is a process through which the inked image from a printing plate in transferred on to a rubber blanket roller, which is then pressed against the substrate. Lithography uses a smooth printing plate and functions on the basis that oil and water repel each other. when the plate passes under the ink roller non image areas that have a water film repel the oily inks that stick to the image areas.

- Lithography produces good photographic reproduction and fine line work on a variety of stocks.
- Printing plates are easy to prepare and high speeds are achievable which helps make it a low-cost printing method.

- Offset Web printing.

This uses stock that is supplied on massive rolls rather than individual sheets. this makes for a higher volume of printing speeds and a lower production cost per unit for high volume print jobs, webs are most commonly used with relief printing methods such as flexography or rotogravure as the plates are more durable. Due to the scale and cost of this method it is not suitable for low volume print runs.

- Rotogravure.

Rotogravure (Roto or Gravure for short) is a type of intaglio printing process; that is, it involves engraving the image onto an image carrier. In gravure printing, the image is engraved onto a cylinder because, like offset printing and flexography, it uses a rotary printing press. Once a staple of newspaper photo features, the rotogravure process is still used for commercial printing of magazines, postcards, and corrugated (cardboard) product packaging.\

- Flexography.

Flexography (often abbreviated to flexo) is a form of printing process which utilizes a flexible relief plate. It is basically an updated version of letterpress that can be used for printing on almost any type of substrate including plastic, metallic films, cellophane, and paper. It is widely used for printing on the non-porous substrates required for various types of food packaging (it is also well suited for printing large areas of solid color).














- Pad Printing.

Pad printing is a printing process that can transfer a 2-D image onto a 3-D object. This is accomplished using an indirect offset (gravure) printing process that involves an image being transferred from the printing plate (cliché) via a silicone pad onto a substrate (surface to be printed). Pad printing is used for printing on otherwise impossible products in many industries including medical, automotive, promotional, apparel, electronics, appliances, sports equipment and toys. It can also be used to deposit functional materials such as conductive inks, adhesives, dyes and lubricants.

- Digital Print.

Digital printing refers to methods of printing from a digital based image directly to a variety of media. It usually refers to professional printing where small run jobs from desktop publishing and other digital sources are printed using large format and/or high volume laser or inkjet printers. Digital printing has a higher cost per page than more traditional offset printing methods but this price is usually offset by the cost saving in avoiding all the technical steps in between needed to make printing plates. It also allows for on demand printing, short turn around, and even a modification of the image (variable data) with each impression. The savings in labor and ever increasing capability of digital presses means digital printing is reaching a point where it will match or supersede offset printing technology's ability to produce larger print runs at a low price.

- Letterpress.

Letterpress printing is relief printing of text and image using a press with a "type-high bed" printing press and movable type, in which a reversed, raised surface is inked and then pressed into a sheet of paper to obtain a positive right-reading image. In addition to the direct impression of inked movable type onto paper or another receptive surface, letterpress is also the direct impression of inked printmaking blocks such as photo-etched zinc "cuts" (plates), linoleum blocks, wood engravings, etc., using such a press.

In the 21st century, commercial letterpress has been revived by the use of 'water-wash' photopolymer plates that are adhered to a near-type-high base to produce a relief printing surface typically from digitally-rendered art and typography.

-  Screen Printing.

Screen printing is a printing technique that uses a woven mesh to support an ink-blocking stencil. The attached stencil forms open areas of mesh that transfer ink or other printable materials which can be pressed through the mesh as a sharp-edged image onto a substrate. A roller or squeegee is moved across the screen stencil, forcing or pumping ink past the threads of the woven mesh in the open areas.

Screen printing is also a stencil method of print making in which a design is imposed on a screen of silk or other fine mesh, with blank areas coated with an impermeable substance, and ink is forced through the mesh onto the printing surface. It is also known as silkscreen, serigraphy, and serigraph printing.