Printmaking
Color

Printmakers apply color to their prints in many different ways. Some coloring techniques include positive surface roll, negative surface roll, and A la poupée. Often color in printmaking that involves etching, screen printing, woodcut, or linocut is applied by either using separate plates, blocks or screens or by using a reductionist approach. In multiple plate color techniques, a number of plates, screens or blocks are produced, each providing a different color. Each separate plate, screen, or block will be inked up in a different color and applied in a particular sequence to produce the entire picture. On average about three to four plates are produced, but there are occasions where a printmaker may use up to seven plates. Every application of another plate of color will interact with the color already applied to the paper, and this must be kept in mind when producing the separation of colors. The lightest colors are often applied first, and then darker colors successively until the darkest.

The reductionist approach to producing color is to start with a lino or wood block that is either blank or with a simple etching. Upon each printing of color the printmaker will then further cut into the lino or woodblock removing more material and then apply another color and reprint. Each successive removal of lino or wood from the block will expose the already printed color to the viewer of the print. Picasso is often cited as the inventor of reduction printmaking, although there is evidence of this method in use 25 years before Picasso's linocuts.

The subtractive color concept is also used in offset or digital print and is present in bitmap or vectorial software in CMYK or other color spaces.
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