T&T of print based media

1. Print-based media Edward Hedley Techniques and Technology

2. Techniques and Technology Hand techniques and technology: etching, intaglio, linocut, screen print, woodcut, lithography. Mechanical techniques and technology: letterpress, Gravure and Screen process Digital and technology: photocopying, laser printing, inkjet, desktop publishing (DTP), digital screen printing.

3. Etching The technique is supposed that it was introduced by Daniel Hopfer of Germany, who decorated armour, and used the technique to printmaking. Etching soon became the most fashionable printmaking medium. Its huge benefit was that, engraving required special skill in metalworking, etching is reasonably simple to learn, especially for an artist who is skilled in drawing. Hand

4. Techniques intaglio and Technology techniques in which the icon is incised into a surface, known as the matrix or plate. Usually, zinc or copper plates are used as a surface, and the incisions are formed by etching, aquatint, engraving, dry point or mezzotint. To print an intaglio plate, ink is added to the surface and then rubbed with tarlatan cloth to remove most of the excess. At the end, a cloth or old newspaper is used to wipe off the rest of the ink, leaving the icon. A wet bit of paper is then added to the top and the plate and paper are run through a printing press that, through pressure, transfers the ink from the recesses of the plate to the paper. Hand

5. linocut Linocut is a printmaking technique, a alternative of woodcut in which a piece of linoleum is used for the support of the surface. A pattern is cut into the linoleum surface with a sharp knife, of what you would want it to look like, and then the raised areas indicating a reversal of the parts to show printed. The linoleum piece is inked with a roller and then rolled onto paper or cloth. The actual printing can be done by hand or with a press, so makes it quite useful. Hand

6. screen print Involves making a stencil that you would use to put underneath the woven mesh and then pour a bit of colour, from example paint at the side, and then use a roller called a squeegee to roll the paint over the top of the mesh and the stencil, to print the stencil pattern on a bit of paper at the bottom. It is also known as Screen Printing, silkscreen, seriography, and serigraph. Hand

7. woodcut Uses a block of wood that would have to be carved into the shape that you would want. The area cut out will not show up on the paper or cloth, leaving the remains behind to print. The surface is covered with ink by the roller and then pressed against the fabric. Hand

8. lithography It uses stones, plates, metal... Anything that can have a smooth surface. It is used to print text and pictures onto paper and is very useful. It has an amazing artistic look that many artists use to create super artwork. The image may be printed directly from the stone or plate and may be balance out by removing it to a flexible sheet, usually rubber. Hand

9. Letterpress Is a printing technique that prints images and text by a type-high bed printing press and moveable type, where a raised area is inked and then pressed onto a piece of paper. It was created by Johannes Gutenberg in the mid 15th century and was mainly used for books. Mechanical

10. Gravure Mechanical Process in which the image to be printed and engraved into the printing plate, and the printing ink. It is then moved directly on to the paper. Gravure is used mostly for long runs of high quality multicolour printing.

11. Screen process You need a nylon mesh over a wooden frame The mesh is painted with an light sensitive emulsion. When the emulsion dries it will block out the holes in the mesh. The image is projected onto the mesh and then exposed to ultra-violet light. The mesh is then washed and areas of the mesh which have not been exposed to the light will have the emulsion removed. This technique produces a stencil made out of the mesh which can then be built into part of a printing press Paint is the put over the top of the mesh and a squeegee is used to bring the stencil to life. Mechanical

12. Photocopying Digital Photocopying is a very cheap and fast process that makes paper copies of text and images. The photocopiers use heat to get the ink to stay to the paper by using a light sensitive electrostatic charge. The toner ink is positivity charged and sticks to the negativity charged part of the image. Photocopiers are also know as xerography.

13. How a photocopier works Digital

14. laser printing Laser printer is a computer printer that prints high quality images and text. The images are produced by a laser beam in the printer, the laser beam projects an image on the paper. Digital

15. inkjet It is the most popular used printer. It is another type of computer printer that gets droplets of ink on the paper to create a digital image It was first developed in the 1950s and started in the 1970s Digital

16. desktop publishing Also called DTP is a personal computer combined with WYSIWYG page layout software. It does it for large scale publishing or small scale local multifunction peripheral output and distribution. Desktop publishing started in the 1985s with the beginning of MacPublisher, the first WYSIWYG layout program. Digital

18. Digital printing uses a technique called “ablation technology”. This involves using a laser to remove silicone and it forms a polyester plate where ink can be laid down. No chemicals are used in this process.

19. All colours can be printed simultaneously making this a fast and efficient process. The equipment cost is expensive but it is cheaper to use this method because of lower running costs.