3. ETCHING
Definition of etching
The process of making a print: The surface of a metal plate is covered in wax and the artist then creates their image by scratching into the wax.
The plate is then immersed in an acid bath.
The areas of the plate not covered by the wax are then ‘eaten’ away by the acid creating a grove for the ink to sit in.
The plate is then covered with ink most of which is then rubbed off so only in ink in the groves remains.
Dampened paper is then placed on an etching press and the plate placed ink side down on top of it.
All this is covered with layers of padding and run through the press which looks a bit like a mangle.
The image has now been transferred to the paper.Photo-etching (also called photogravure or heliogravue) uses a light reactive acid resistant ground.
The image is then projected onto the plate reproducing the photograph
Advantage
The standard of the outcome is very high
Disadvantage
Very time consuming
4. Linocut
Linocut is a form of relief printing. A design is carved into a
piece of lino(linoleum). This is inked with a brayer and a print
made by placing a sheet of paper on top so the ink is
transferred to the paper. Pressure is applied to get an even
transfer of the ink by either running the linocut block and paper
through a printing press or using a burnisher.
Advantage
The standard of the outcome is very high
Disadvantage
It is quite complicated
5. Screen Print
Method in which ink is applied directly to the surface to be printed .The image to
be printed is photographically transferred to a very fine fabric such that the non-
printing areas are blocked off and the fabric serves as a stencil. The ink is wiped
across the screen to pass through the unblocked pores and reach the substrate.
For each colour to be printed a separate screen is prepared and the process is
repeated. It is more suitable for curved shapes, non-porous surfaces and short
print runs.
Advantage
Very useful commercially
Disadvantage
Images for screen printing have to be simple
6. Woodcut
Woodcut is a relief printing technique in printmaking in which an image is carved
into the surface of a block of wood.
The areas to show 'white' are cut away with a knife or chisel, leaving the
characters or image to show in 'black' at the original surface level.
The block is cut along the grain of the wood .The surface is covered with ink by
rolling over the surface with an ink-covered roller leaving ink upon the flat surface
but not in the non-printing areas.
Advantages
Its quick and easy to make
Disadvantage
Hard to carve small lettering into the template
7. Lithography
A printing technique by which the image to be printed is fixed on a stone or
metal plate with a combination of ink-absorbent and ink-repellent vehicles.
Lithography is where you use a stone to print on a smooth surface.
It was Invented in 1796
It can be used to print text or artwork onto paper or another suitable material
Advantages
Cheap
Disadvantages
Materials are complex to use
8. Letterpress
Letterpress is the oldest form of printing. In this method, a surface with raised
letters is inked and pressed to the surface of the printing substrate to reproduce
an image in reverse. Typically, metal type has been used but other possibilities
include carved wood or stone blocks.
After the Gutenberg press introduced movable type to the process in the 15th
century, letterpress was the predominant printing method for 500 years.
Advantages
A simple straightforward process
Disadvantages
Each colour has to dry before applying the next
9. Gravure
Gravure is a printing method in which an image is applied to a
printing substrate by use of a metal plate mounted on a cylinder.
Unlike other processes, gravure uses a depressed or sunken surface
for the desired image.The image to be reproduced is etched into
the metal plate, sometimes with the use of a laser .The metal plate
is bathed in ink during the process and then wiped clean before
application to the substrate.
Advantages
The outcome is high quality.
Disadvantages
expensive
10. Screen processing
Ink is applied to the back of the image carrier and pushed
through porous or open areas.
Advantages
quick, easy and precise
Disadvantages
If there is one mistake then loads of copies can be
destroyed
11. Photocopying
A copying process using photographic methods and equipment.
Photocopying may use conventional photographic techniques to
produce high-quality copies from fine-tone originals and to prepare
offset printing plates, or it may use a simplified process to produce
copies of texts, tables, blueprints, and drawings.
Advantages
Quick and cheap
Disadvantages
Can break down easily, get jammed and ruin copies
12. Laser printing
A printer that uses a laser and the electro photographic method to
print a full page at a time.The laser "paints" a charged drum with
light, to which toner is applied and then transferred onto paper.
Desktop laser printers use cut sheets like a copy machine. Large
printers may use paper rolls that are cut after printing.
Advantages
Colour printing is possible and quality is good
Disadvantages
Prints wet and needs time to dry
13. Inkjet
A printer that propels droplets of ink directly onto the medium.
Today, almost all inkjet printers produce colour. Low-end inkjets use
three ink colours but produce a composite black that is often
muddy. Four-color inkjets use black ink for pure black printing. Inkjet
printers run the gamut from less than a hundred to a couple
hundred dollars for home use to tens of thousands of dollars for
commercial poster printers.
Advantages
Cheap and easy to refill cartridges
Disadvantages
Need special papers
14. Desktop publishing
Using a desktop computer to produce high-quality printed
output or camera-ready output for commercial printing. It
requires a desktop publishing program, such as Adobe
InDesign or QuarkXPress, a large monitor and laser printer.
Advantages
High quality outcome
Disadvantages
complicated to use