Carborundum printmaking
Encyclopedia
Carborundum printmaking is a collagraph printmaking
Printmaking
Printmaking is the process of making artworks by printing, normally on paper. Printmaking normally covers only the process of creating prints with an element of originality, rather than just being a photographic reproduction of a painting. Except in the case of monotyping, the process is capable...

 technique in which the image is created by adding light passages to a dark field. It is a relatively new process invented in the US during the 1930s that allows artists to work on a large scale. Normally, cardboard
Paperboard
Paperboard is a thick paper based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker than paper. According to ISO standards, paperboard is a paper with a basis weight above 224 g/m2, but there are exceptions. Paperboard can be single...

 or wood
Wood
Wood is a hard, fibrous tissue found in many trees. It has been used for hundreds of thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers embedded in a matrix of lignin which resists compression...

 plates are coated in a layer of carborundum
Silicon carbide
Silicon carbide , also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been mass-produced since 1893 for use as an abrasive...

 or screen
Screen
- Separation or partitioning :* Window screen, a wire mesh that covers a window opening* Fire screen, a device to put in front of a fireplace* Windbreak of trees or shrubs* Windshield , protects the driver of a vehicle...

, and the lights are created by filling in the texture with screen filler or glue. Carborundum prints may be printed as intaglio
Intaglio (printmaking)
Intaglio is a family of printmaking techniques in which the image is incised into a surface, known as the matrix or plate, and the incised line or area holds the ink. Normally, copper or zinc plates are used as a surface, and the incisions are created by etching, engraving, drypoint, aquatint or...

 plates.

Carborundum was originally used by printmakers to grind down lithography
Lithography
Lithography is a method for printing using a stone or a metal plate with a completely smooth surface...

 stones and is now used in collagraph prints to create gradients of tone and a sandy texture. It works because when the carborundum adheres to the plate the ink sits around it. It can be applied in a number of different ways:
  • Painting onto the plate with a liquid glue and then sprinkling the carborundum onto it
  • Mixing different amounts of glue with it and then painting them on in sections, the more grit used the darker. Example: one spoon of carborundum to five spoons of glue will be much lighter than five spoons of carborundum to five spoons of glue.
  • Using stencil
    Stencil
    A stencil is a thin sheet of material, such as paper, plastic, or metal, with letters or a design cut from it, used to produce the letters or design on an underlying surface by applying pigment through the cut-out holes in the material. The key advantage of a stencil is that it can be reused to...

    s to apply the glue and sprinkling different amounts of carborundum through the different stencils.


To print a carborundum print, the surface is covered in ink, and then the surface is wiped clean with tarlatan cloth or newspaper, leaving ink only in the texture of the screen or carborundum
Silicon carbide
Silicon carbide , also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been mass-produced since 1893 for use as an abrasive...

. A damp piece of paper is placed on 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. Very large editions are not possible as a small amount of carborundum comes off every time it is wiped down.

Uses

Contrast with relief print
Relief print
A relief print is an image created by a printmaking process where protruding surface faces of the matrix are inked; recessed areas are ink free. Printing the image is therefore a relatively simple matter of inking the face of the matrix and bringing it in firm contact with the paper...

ing, and with planographic printing
Planographic printing
Planographic printing means printing from a flat surface, as opposed to a raised surface or incised surface . Lithography and offset lithography are planographic processes that utilize the property that water will not mix with oil. The image is applying a to a plate or stone...

 techniques such as lithography
Lithography
Lithography is a method for printing using a stone or a metal plate with a completely smooth surface...

.
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