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- Printmaking Terms &
Techniques
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The Print
The image obtained from any printing
element. Originally, this was either a metal plate, engraved in
intaglio, or a wood block (or metal plate) cut in relief. From the
beginning of the nineteenth century, lithographic stones were included,
and today screen-printing ads are a further type of printing element.
An impression taken planographically from a painted surface may also be
termed a print.
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Print methodology
In the past, a rigid distinction
was observed between prints obtained by manual processes and
reproductions obtained by photomechanical methods. This distinction has
less value today, because reproductions have been incorporated into
artists' original prints and are therefore not solely produced, as
originally intended, for mass production.BACK TO TOP
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"Original" print
A print is termed, "original" if
the artist of the design has worked on the printing element himself, as
opposed to reproductive and interpretative prints which involve the use
of an intermediary person to reproduce the design onto the printing
element. Original prints are often only produced in small numbers; they
may be numbered and signed by the artist. These distinctions between
reproductions (which occasionally may also be signed and numbered) and
original prints are, however, generalized.
In practice the frontiers are more
imprecise, particularly in commercial printing. It must be noted that
some people have a much more rigorous definition of an original print
than others, e. g. of a photo-mechanically produced original print of
which only a very small number of impressions, numeration and a
certificate of authenticity will make it qualify.BACK
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Print techniques in combination
Techniques may be, and often have
been, combined: etching with drypoint, etching with aquatint, engraving
with etching, woodcut with wood engraving, even etching with
chiaroscuro woodcut. There are, in addition, many dozens of other
techniques used, typically in combination with these basic ones, and
many variations of the basic techniques. Artists are artists, not
technicians -- no true artist will hesitate to use any technique that
gives him or her the desired result. A brief list of the basic
techniques of printmaking is listed below. Many others exist.BACK
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Lithography (Planographic Printing)
In planographic printing, as opposed
to intaglio and relief processes, there is no difference in level
between the inked surface and the non-inked surface. The
following sections detail variations of lithographic prints. BACK
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Lithograph
The design is drawn or painted on
the polished, or grained, flat surface of a stone, usually Bavarian
limestone, with a greasy crayon or ink. The design is chemically fixed
on the stone with a weak solution of acid and gum Arabic. In printing,
the stone is flooded with water which is absorbed everywhere except
where repelled by the greasy ink. Oil-based printer's ink is then
rolled on the stone, which is repelled in turn by the water-soaked
areas and accepted only by the drawn design. A piece of paper is laid
on the stone and it is run through the press with light pressure, the
final print showing neither a raised nor embossed quality but lying
entirely on the surface of the paper. The design may be divided among
several stones, properly registered, to produce, through multiple
printings, a lithograph in more than one color. A transfer lithograph
(French, autographie) employs the same technique,
but the design is drawn on special transfer paper and is later
mechanically transferred to the stone. A zincograph is the same
technique, but employing a zinc plate rather than a stone. BACK
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Collotype
Initially called albertype, after
its principal inventor, this process consists in pouring a layer of
gelatine mixed with potassium chromate over the surface of a zinc or
glass plate which is then exposed to light to receive the image. The
gelatine hardens in proportion to the amount of light received, the
unexposed parts remaining soft and capable of retaining moisture, and
the printing can therefore be done, lithographically: the plate is
dampened with water and the ink is applied with a roller. It adheres to
the surface in inverse proportion to the amount of moisture retained,
the hard areas of gelatine printing the darkest. The reticulated grain
of collotype is particularly good for reproducing watercolor, for which
the process was much used during the latter part of the nineteenth
century. BACK TO TOP
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Offset lithography or offset or
photo-mechanical print
One of the four major industrial
printing techniques of which the others are: letterpress, photogravure
and screenprinting. It has become the most commonly used method in
commercial printing, although its importance in printmaking is not very
great. It is an extension of the lithographic technique: the image is
picked up from the stone, or more usually plate (either zinc or
aluminium which has either been grained or covered with an absorbent
oxide), by a rubber roller which then reprints it onto paper. Text and
image can be transferred photographically and prepared in the usual
lithographic technique based on the natural antipathy between grease
and water. The advantage of offset is that it enables the damping,
inking and printing itself to be done by a series of rollers which
enormously speeds the operation, thereby enhancing the commercial value
of the technique. BACK TO TOP
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Clich-verre (glass print)
A glass plate is covered with ink
or paint and a design is drawn through it with a stylus or brush,
producing a negative matrix. A piece of photo-sensitized paper is
placed beneath it and it is exposed to light. A positive,
proto-photographic image appears on the paper. It should be noted that
this is a print without printing; there is no ink on the paper. BACK
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Chine Coll
Areas of thin colored tissue /
rice paper mounted (collage or Coll) on or glued to the surface of a
print. Frequently combined with etching or lithography this
process, the ink of the plate glues the thin paper to the substrate as
the print is run through the press.BACK TO TOP
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Intaglio Printing
A printing process in which the image
is incised or etched into a metal plate using a variety of techniques
and tools. Ink is applied to the recessed areas of the
printing plate by wiping, dabbing, or a combination of both. The paper
receives the ink from the incised marks and not from the top surface of
the plate, although thin films of ink may be left on the surface to
produce a variety of tonal effects. For intaglio printing, the paper is
dampened so that under printing pressure it will be squeezed into all
the inked recesses of the plate and around it (leaving a PLATE MARK if
the plate is smaller than the paper).
One of the distinguishing
characteristics of this type of printing is that the dried ink
impression stands up from the paper in very slight relief, perceptible
by touching with the fingers or by close inspection.
In all intaglio prints, except
mezzotint, the design is produced from ink in lines or areas below the
surface of the plate. The smooth surface is wiped of ink before
printing. Considerable pressure is used in the press to force the ink
out of the lines and areas and, to an extent, to force the paper into
them, so the final printed image will appear to be slightly raised
above the surface of the un-inked paper.BACK TO TOP
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Engraving
Lines are incised on a highly
polished metal plate by means of a sharp-pointed instrument,
diamond-shaped in cross section, called a burin or graver. The tool
works like a plough cutting a furrow. The strength of the line may be
increased by cutting deeper. The burin is held in a fixed position and,
to produce a curved line, the plate itself is turned. This makes
engraving a slow and painstaking technique producing controlled, formal
results. BACK TO TOP
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Drypoint
Lines are scratched into the metal
plate using any sharp instrument with the same freedom as a pencil. The
effect is spontaneous, not formal. Cutting into the plate throws up, on
each side of the cut, ridges of displaced metal, which are called burr.
In the printing of the plate, these ridges will also take some ink and
print a kind of inky glow around the line. BACK TO TOP
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Etching
Lines are bitten into the metal
plate through the use of acid. To begin with, the plate is covered with
a thin, acid-impervious coating called a ground which is smoked to a
uniform black. Lines are drawn through the ground with a stylus baring
the metal of the plate. Acid is then applied which eats into the
exposed areas. The longer the plate is exposed to the acid, the deeper
the bite and therefore the stronger the line. Different depths are
achieved by covering some lines with acid-impervious varnish (stop-out)
and biting others a second (or third) time. The appearance of etchings
is usually free and spontaneous but the technique has occasionally been
used to produce results almost as formal as engraving. BACK
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Soft-ground etching
One of the etching processes which
aims to simulate the effects of a chalk or crayon drawing (see: crayon
manner). The plate is initially covered with a soft ground. The drawing
is made with a hard crayon on paper which has been pressed to the
surface of the grounded plate; the ground adheres to the back of the
paper where the crayon has left indentations in it, thereby creating an
impression on the plate of the crayon marks. The paper with the
attached ground is carefully removed and the plate is bitten. It is
possible to reproduce any kind of texture with this method: textiles,
rough papers, netting or leather can be pressed into a soft ground in a
similar fashion. BACK TO TOP
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Aquatint
A technique of acid-biting areas
of tone rather than lines. A ground is used that is not completely
impervious to acid, and a pebbly or granular texture (broad or fine) is
produced on the metal plate. Stop-out, second and third bites
are. used to produce variations of darkness. BACK TO TOP
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Carborundum
A very hard mixture consisting
primarily of silicon carbide; it is used as an abrasive and, in
powdered form, in a method of engraving invented by Henri Goetz. He
used it to obtain a dotted effect by sprinkling it over a metal plate
(usually duralumin) which was then pulled through a press, thereby
causing the grains to penetrate the metal. BACK TO TOP
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Mezzotint
The only intaglio technique that
proceeds from dark to light rather than the opposite. The metal plate
is totally abraded with an instrument called a rocker. Were it inked
and printed at this point, it would produce an even, rich black. The
design, in areas of tone rather than lines, is produced entirely by
smoothing areas of the plate with a scraper or a burnishing tool. The
more scraping and burnishing done, the lighter the area. BACK
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Photogravure
Sometimes known as heliogravure
(particularly hand photogravure), this technique is one of the most
important methods of industrial printing (the others being letterpress
and offset lithography). It is an intaglio process which can be divided
into two procedures: (1) Hand photogravure, a derivation of the
aquatint in its method of obtaining tone. After sensitizing a copper
plate and exposing it to light to form the image, resin or bitumen
grain was scattered over it. The procedure continued as for a normal
aquatint plate. This technique subsequently developed into a totally
photomechanical process: (2) Machine photogravure, in which the tone is
supplied by a cross-line screen. It was discovered that the plate could
be bent into the form of a cylinder, a development which allowed very
fast printing speeds (rotogravure). The technique is used more for
magazines and catalogues than for print-making itself. BACK
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Relief Printing
A printing process in which the
impression is created by the uncarved areas or the unprepared surface
of the PRINTING ELEMENT, which has been inked with a ROLLER, BRAYER, or
other tool. The cut, or incised, areas do not usually print, since they
are recessed and are rarely inked. Nonetheless, during a run paper is
often pushed into these sunken areas, creating an embossed effect. The
recessed areas do print when the printing element is inked in the same
manner as an etching plate, with the surface wiped dean, leaving ink in
the recesses. WOODCUT and LINOCUT are usually used for relief printing.
In all relief techniques it is the
surface of the block that is inked and printed and, given perfect
printing, all lines or surfaces will be equally dark. Moderate pressure
in the press will emboss the paper to an extent, so the inked design
will lie slightly below the uninked surface of the paper. BACK
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Woodcut
The design is drawn on a wood
plank (side grain) and those areas that are not to print are cut away
well below the surface with a knife or gouge. Linocut is the same
technique using linoleum rather than wood. BACK TO TOP
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Chiaroscuro Woodcut
The design is divided among
several blocks, each to print a different color, with or without
overlaps. Those areas cut away in all blocks will not print at all and
thus provide highlights of the natural color of the paper used, the
light of the "light-dark" technique. The blocks must be carefully
matched in placement of the design (registration) and the paper must
pass through as many printings as there are blocks. BACK
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Wood Engraving
Tools similar to metal engraving
are used on polished blocks of end-grain wood (usually boxwood), but
instead of producing lines that will print, they are used to produce
non-printing lines. It is the uncut surface that will take the ink and
print.BACK TO TOP
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Linocut or linoleum cut
An abbreviation of linoleum cut.
The technique is a derivation of the woodcut but owing to the supple,
relatively soft properties of the material, linocuts have different
characteristics. The material takes all types of lines, but is most
suited to large designs with contrasting dark and light flat tints. The
material is cut with small pen-like tools which have a mushroom-shaped
handle. The tools have a variety of forms: straight and rounded edge,
double-pointed, as a chisel or a V-shaped chisel, etc. As on a woodcut,
the relief parts of the block are inked. For printing a large number of
important proofs, the linoleum is attached to a wooden block. Color
printing is done with several linoleum blocks. Long disparaged by
serious artists as not challenging enough, the linocut came into its
own after artists like Picasso and Matisse began to work in that
technique.BACK TO TOP
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Monotype
A design is drawn in ink or paint
on any smooth surface. While the ink or paint is still wet, a piece of
paper is laid on top of it and pressure applied, either with a press or
by hand. The process, by its name, is meant to produce a single
impression, but there is sometimes enough damp ink left on the plate
surface to make a second, weaker, impression. BACK
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