Intaglio Print
The technique of intaglio (in-tal'-yo) printmaking is done using many
methods and techniques. The image may be scratched into the surface of a metal
or plastic plate such as in dry point, or engraved into the surface with burins, or etched into the plates surface with acid.
The lines, pits or grooves in the plates surface are then wiped with ink forcing
the ink into the recesses. Excess ink is removed from the surface with tarletan rags. When the plate is cleaned of ink
except for in the lines, damp paper is placed over the plate. The plate is passed through an
intaglio press under extreme pressure to transfer the ink from the lines to the paper. This process is repeated to create
an edition of the plates image.
Solar Plate printing
is done from a metal plate that has a photopolymer emulsion surface. The image is exposed to the
plate via a positive image transparency. The image may be drawn directly to the mylar or acetate sheet then placed image
side down to the solar plate's emulsion to be exposed to UV light. (sunlight or ultra violet bulbs) Drawing
directly on the solar plate is also possible. Using the transparency method enables you to re-expose the original image if
there is a problem with the first exposure. After the plate is exposed the un-exposed areas are washed out with water.
These are the image areas. These "etched" areas are what hold the ink and produce the image when run through the press.
I was introduced to the method by Herb Jackson a prominent painter and printmaker at Davidson College in North Carolina after printing solar plate editions for him.
I have found that the medium offers me the flexability of mark making much like the monotype
images I make. The only drawback is that the plates can not be re-worked easily once they are exposed. The advantage of this
process is that there are no chemicals used, no acid and if you use water based inkes no harmful solvents, just tap water.
The images Flying Low, The Exit, and Captives Wandering found on the Art Gallery page are solar plate etchings.
Relief Printing
A relief print is cut primarily from wood
and linoleum blocks. The artist will draw directly or transfer an image to the blocks surface. The drawn image lines will
remain and the surrounding areas of the block will be cut away leaving the image area in relief. It is this surface that will receive ink from a brayer. When paper is placed over the inked surface and
pressure is applied the image is transferred to the paper.
A fingerprint is a relief print.
- Woodcuts may be made from most soft wood planks. Clear pine works well. I have even used birch ply and poplar
wood. Some artists like to incorporate a knot or the grain of the wood into their imagery. Wood engraving is done from the end grain of a harder wood like maple, boxwood, apple or pear. The tighter end grain provides a more precise cut allowing the artist the ability to cut finer lines and
detail.
- Artists that use linoleum as a printing matrix are able to cut more easily due to the lack of wood grain.
- To achieve multiple colors in a relief print you can cut multiple blocks that are identical in size and register each
block with a new color precisely with the paper for each color run. The reduction method uses just one block. After
each color run, that color area is cut away for the next color run. This is done for every color in multi-color
printing. Reduction printing requires the artist to have a clear idea about the colors to be used and the sequence of printing
the color runs.The number of the edition varies depending on the printing medium (wood, linoleum) and the cut. Softer woods like
pine break down quicker as does linoleum. Through the printing process the edges may break down diminishing the
crispness of the image. Wood engravings yiels a larger edition due to the hardness of the wood and the end grain cutting.
My releif editions on wood and linoleum
are generally 25 or fewer.
Lithography
Lithography is a planographic process.
The image is created and printed from the surface of a prepared limestone slab (the traditional method) or the more
modern medium, using a ball ground aluminum plate.
Bavarian limestone is considered the best
medium to produce art lithographs from. Limestone is made up of minute animal crystal fossils. The process is very complicated.
After the stone is leveled by grinding it down with a fine grit using a levigator the image can be created. Essentially the
process is thus: the stones surface is drawn upon with a greasy substance such as a litho crayon. The fats in the grease are
embedded into the surface of the stone and then treated chemically so that the grease crystallizes into the surface. These
areas will always attract more grease which what inks are. The process also desensitizes non-image areas so that as long as
those areas remain wet they will not take ink.
Large editions are possible with lithography.
This is what made it such a popular medium in the nineteenth century and even today commercially. As long as the stone is
kept free of faults editions of five hundred are not uncommon. Most artists and ateliers will not print a larger edition.
Color printing requires multiple plates
or stones or a combination of. There are some tricks to get more than one color
on a stone or plate though.