Any rough or prickly envelope of the seeds of plants, whether a pericarp, a persistent calyx, or an involucre, as of the chestnut and burdock; a seed vessel having hooks or prickles. Also, any weed which bears burs.
When using a drypoint needle or other engraving tool to draw directly into a metal plate, small, fine pieces of metal are raised up on both sides of the scored line. This burr holds additional ink during the printing process and gives the lines velvety of fuzzy texture. Burr is very delicate and consequently is easily worn down during the pressures of the printing process. Early pulls or impressions taken from such plates are characterized by rich burr. In the case of Old Master Prints especially, the quantity and evidence of burr can sometimes be used as an aid in determining how early the impression was pulled.
The metal ridge thrown up when the burin or drypoint tool is raked across the metal plate. This burred edge is much appreciated for its rich and highly expressive printed result. Unless the plate is steel-faced, the burr on copper will quickly flatten and erode after 20-30 impressions. Also, the roughened area produced by the rocker tool in the mezzotint.
1: an adherent fragment of parent material at a component edge. In leadframes, due to the stamping operation, the metal burr may be in a horizontal or vertical direction relative to the surface. In ceramic packages, this type of characteristic is called a fin. 2: in cerpack packages, a fragment of excess material or foreign particle adhering to the surface.
A subtle ridge on the edge of strip stainless steel resulting from cutting operations such as slitting, trimming, shearing, or blanking. For example, as a stainless steel processor trims the sides of the sheet stainless steel parallel or cuts a sheet of stainless steel into strips, its edges will bend with the direction of the cut.
The very subtle ridge on the edge of strip steel left by cutting operations such as slitting, trimming, shearing, or blanking. For example, as a steel processor trims the sides of the sheet steel parallel or cuts a sheet of steel into strips, its edges will bend with the direction of the cut (see Edge Rolling).
Burrs are small cutters used in die grinders, rotary tools or dentist's drills. The name may be considered appropriate when their small sized head (3 mm diameter shaft) is compared to that of a burr seed.
In engineering, a burr refers to the raised edge on a metal part. It may be present in the form of a fine wire on the edge of a freshly sharpened tool or as a raised portion on a surface, after being struck a blow from an equally hard, or heavy object.
A term usually applied to a type of veneer, or perhaps more properly the marks in the veneer itself. The veneer is cut from a knot or other protruding growth on the tree, and as a result displays highly attractive graining. Walnut is especially popular for this, and bird's eye maple is another, particularly well-known type of burr veneer.
A guttural pronounciation of the letter r, produced by trilling the extremity of the soft palate against the back part of the tongue; rotacism; -- often called the Newcastle burr, Northumberland burr, or Tweedside burr.
Burr: A Novel is a 1973 historical novel by Gore Vidal. Burr challenges the traditional iconography of American history through a fictional narrative and memoir by Aaron Burr, who was an officer in the Revolutionary War, a lawyer, and the vice president during Thomas Jefferson's first term as president of the United States.
A burr is a seed or dry fruit in which the seeds bear hooks or teeth which attach themselves to fur or clothing of passing animals or people. The hooks or teeth can be irritants. It is the inspiration for Velcro.