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Vitreography is a fine art printmaking technique that uses a float glass matrix instead of the traditional matrices of metal, wood or stone. A print created using the technique is called a vitreograph. Unlike a monotype, in which ink is painted onto a smooth glass plate and transferred to paper to produce a unique work, the vitreograph technique involves fixing the imagery in, or on, the glass plate. This allows the production of an edition of prints. ==Advantages/disadvantages of vitreography== In addition to being relatively inexpensive, glass is chemically inert. It does not oxidize, nor does it change or interact with the composition of printing inks, especially yellows and whites, which can turn green or gray in contact with metal plates.〔Lidh, W. (1986) “Prints from Glass”, Introduction. Western Carolina University, Cullowhee, NC,〕 According to Claire Van Vliet of Janus Press, intaglio vitreographs also have an advantage over metal in that the glass plate wipes cleanly in non-image areas, allowing bright white to coincide with “black that is velvety as a mezzotint” in the finished print.〔McLean, G. (1999) “In Black and White: Landscape Prints by Claire Van Vliet”, page 61. Stinehour Press, Vermont〕 Another advantage of vitreograph printmaking is its ability to withstand the pressure of the printing press with no discernible breakdown of the imagery, even after numerous runs. Printmaker Ken Kerslake wrote, “The glass plate will last indefinitely because, unlike (of ) copper or zinc, it will always return to its original configuration no matter how much pressure is applied.”〔Kerslake(1998) “Vitreography: The Art and Technique of the Glass Print”, page 46. Glass Art, Vol. 13 No. 3〕 A disadvantage to this is that unwanted lines or marks on the glass plate cannot be burnished out, as they can on a zinc or copper plate.〔Kessler, (1987) “Luminous Impressions: Prints from Glass Plates”, page 12. Mint Museum, Department of Art, Charlotte, NC〕 The transparency of the glass plate can be used to advantage, in that the plate may be placed over a preliminary drawing on paper to guide the artist in creating a drawing on the plate. This is done by placing the drawing face down on a light table (to allow for the reversal of the image in printing) and placing the vitreograph plate on top of it.〔Byrd, J. Falconer (1998) “Littreography”, page 15, special edition reprinted with permission of GLASS: the Urban Glass Quarterly, Number 72, Fall 1998〕 Although glass is unaffected by compression in the printing press, it will break under tension. For that reason, vitreographs are always printed on an etching press, whose rigid bed will support the glass plate firmly.〔Kerslake (1998) page 46〕 In addition, the press bed must be level and working conditions in the print shop immaculate. A particle of grit or dirt between press bed and the plate will create a tension point that will cause the glass to crack when pressure is applied.〔Kerslake, 1998, page 44〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「vitreography」の詳細全文を読む スポンサード リンク
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