![]() It can be differentiated from litho, flexography, gravure or letterpress printing in many ways, some of which are A standard heat-sealable coating on the reverse side allows the film to be made immediately into packages. Special coatings are necessary to receive the ink. The ink, usually in powder form, is attracted on to the film surface and cured in place. A design is created on a computer it may be an individual design or replicated to give several hundreds of impressions. it is now possible to create artwork on a computer and transfer the image directly to the packaging film. 24.2.5 Digital pressĭigital printing is the reproduction of digital images on a physical surface, such as common or photographic paper or paperboard-cover stock, film, cloth, plastic, vinyl, magnets, labels etc. ![]() Now a day this printing technology is utilized for printing on polyethylene bags, corrugated boxes and carton after using the photosensitive resins of improved printing quality. Its printing quality is inferior to that of modern printing techniques such as offset printing and gravure printing. Because the costs of producing the plates are relatively low, flexographic printing is cost effective, especially for short runs. Ink is picked up by a cavitated anilox roll and transferred to the printing plate. The print surface then rotates, contacting the print material which transfers the ink. A measured amount of ink is deposited upon the surface of the printing plate. Flexography (also called "surface printing"), often abbreviated to "flexo", is a method of printing most commonly used for packaging (labels, tape, bags, boxes, banners, and so on).A flexo print is achieved by creating a mirrored master of the required image as a 3D relief in a rubber or polymer material. 24.2.4 Flexographyįlexographic printing is widely used in western countries. 24.2.3 Screen printing Screen printing has its origins in simple stenciling, most notably of the Japanese form (katazome), used who cut banana leaves and inserted ink through the design holes on textiles, mostly for clothing. Although purchasing a chromolithograph may have been cheaper than purchasing a painting, it was still expensive in comparison to other color printing methods which were later developed. As stated earlier, production costs of chromolithographs were low, but efforts were still being made to find a cheaper way to mass produce colored prints. ![]() Many chromolithographs have deteriorated because of the acidic frames surrounding them. Lithographers sought to find a way to print on flat surfaces with the use of chemicals instead of relief or intaglio printing.Ĭhromolithographs are mainly used today as fine art instead of advertisements, and they are hard to find owing to poor methods of preservation and also because a cheaper form of printing replaced it. This type of colour printing stemmed from the process of lithography, and it includes all types of lithography that are printed in colour. 24.2.2 Colour printingĬhromolithography is a method for making multi-colour prints. Most books, indeed all types of high-volume text, are now printed using offset lithography. High-volume lithography is used today to produce packaging materials, just about any smooth, mass-produced item with print and graphics on it. This allows for a relatively flat print plate which allows for much longer runs than the older physical methods of imaging (e.g., embossing or engraving). Thus, when the plate come in contact with a compatible ink and water mixture, the ink will adhere to the positive image and the water will clean the negative image. For instance, the positive part of an image would be a hydrophobic chemical, while the negative image would be water. Lithography is a form of planographic printing, meaning that the surface is flat, in contrast to relief printing or intaglio printing. ![]() Lithography is a printing process that uses chemical processes to create an image. Lithography is a method in which printing is applied on a smooth surface. Numbers of printing are in trend for printing purposes of packaging materials. Printing can be classified into two parts:ġ) Direct Printing: In this type of printing, printed material comes in direct contact with the plate so that the ink is directly applied to the printing medium.Ģ) Indirect Printing: In this printing, the ink is first applied to the blanket cylinder from the plate and then printing medium comes in contact with the blanket The basic systems of printing are: - 1) the original, (2) the plate, (3) printing ink, (4) a printing medium such as paper and (5) a printing machine. It is often carried out as a large-scale industrial process, and is an essential part of publishing and transaction printing. Printing is a process in which text and images are reproduced, typically with ink on paper using a printing press made from letters, photographs and drawing.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |