Metal point drawings are characterized by a fine, delicate line of uniform width. As the point of the wire is drawn across the dried ground, it leaves behind a thin trail of mental particles that soon tarnish to a pale gray. Traditional metal point ground recipe: A mixture of bone ash, glue, & white pigment in water. The drawing surface must be prepared by covering it with a "ground", a preliminary coating of paint. Ancestor to the pencil thin metal wire mounted in a holder (much like mechanical pencil) most common is the silverpoint surface must be prepared w/ coating of poster paint or Chinese white. Can use any soft metal then the wire would be put into wooden scribes- Creates drawings with pure, precise lines made by a thin wire (usually silver) held in a holder. Once put down, the lines cannot easily be changed or erased. (gray scale) - Few artists use it now due to it not being very forgiving on mistakes or indecision. Graphite / Pencil Metal Point Crayon, Pastel, Chalk Produces tight, thin lines - Pencil (graphite)- soft (dark) to hard (light) and high-quality colored pencils in a wide range of colors. Graphite Pencil: Made from carbon mixed with clay. The harder the pencil, the more pale & silvery the line. The softer the pencil, the darker & richer the line it produces. Varying the percentage of clay in the graphite compound allows manufactures to produce pencils that range from very hard (lots of clay) to very soft (minimal amounts of clay). Encased in woof, it became the most common drawing medium tool called a PENCIL. Toward the end of the 18th century, a technique was discovered for binding powdered graphite with fine clay to make a cylindrical drawing stick. More commonly, Graphite must be extracted from various ores & purified, resulting in a powder. But pure, solid graphite is rare & precious (there is only one known deposit). Graphite was adopted as a drawing medium soon after its discovery. Dragged acros an abrasive surface, it leaves a trail of dark gray particles that have a slight sheen. Pure, solid graphite need only be mined, then shaped into a convenient form. (Pencil) + (Graphite / Clay - Hardness) + (gray scale) - A soft, crystalline form of carbon first discovered in the 16th century, graphite is a naturally occurring drawing medium.
0 kommentar(er)
