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Ferrule. Eraser. A pencil (/ ˈpɛnsəl / ⓘ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage and keeps it from marking the user's hand. Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface.
The Culture Fair Intelligence Test (CFIT) was created by Raymond Cattell in 1949 as an attempt to measure cognitive abilities devoid of sociocultural and environmental influences. [1] Scholars have subsequently concluded that the attempt to construct measures of cognitive abilities devoid of the influences of experiential and cultural ...
The first mark sense scanner was the IBM 805 Test Scoring Machine; this read marks by sensing the electrical conductivity of graphite pencil lead using pairs of wire brushes that scanned the page. In the 1930s, Richard Warren at IBM experimented with optical mark sense systems for test scoring, as documented in US Patents 2,150,256 (filed in ...
The grease pencil, a wax writing tool also known as a wax pencil, china marker, or chinagraph pencil (especially in the United Kingdom), is a writing implement made of hardened colored wax and is useful for marking on hard, glossy non-porous surfaces. This pencil is usually made from non-toxic opaque wax (such as paraffin, beeswax, ceresin ...
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.
Blue pencil (editing) Red and blue checking pencil. A blue pencil, also known as a checking pencil, is a two-color pencil traditionally used by an editor to correct a written copy. [1] The blue end is typically Prussian blue, and the red end is typically a warm vermilion red. [1][2] They are most often half red and half blue, but some are 70% ...
Carpenter pencil. A carpenter pencil (carpentry pencil, carpenter's pencil) is a pencil that has a body with a rectangular or elliptical cross-section to allow it to be used as a quick reference to 1/4 and 1/2 inch measurements. The shape also helps prevent it from rolling away as a secondary function. [1] Carpenter pencils are easier to grip ...
A colored pencil (American English), coloured pencil (Commonwealth English), [1] map pencil, [2] pencil crayon, or coloured/colouring lead (Canadian English, Newfoundland English) is an art medium constructed of a narrow, pigmented core encased in a wooden cylindrical case. Unlike graphite and charcoal pencils, colored pencils' cores are wax ...