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Graphite (/ ˈ ɡ r æ f aɪ t /) is a ... The term black lead usually refers to a powdered or processed graphite, matte black in color. Abraham Gottlob Werner coined ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 8 January 2025. Variations of the color gray This article is about variations of the color gray. For other uses, see Shades of gray (disambiguation). For the 2011 novel, see Fifty Shades of Grey. For its 2015 film adaptation, see Fifty Shades of Grey (film). For the novel series, see Fifty Shades (novel ...
Graphite black: RAL 9012: Clean room white [11] Introduced in 2020 [5] RAL 9016: Traffic white: RAL 9017: Traffic black: RAL 9018: Papyrus white: RAL 9022: Pearl ...
Diamond is clear and transparent, but graphite is black and opaque. Diamond is the hardest mineral known (10 on the Mohs scale), but graphite is one of the softest (1–2 on Mohs scale). Diamond is the ultimate abrasive, but graphite is soft and is a very good lubricant.
Graphite may occupy 6 to 10% of the volume of grey iron. Silicon is important for making grey iron as opposed to white cast iron , because silicon is a graphite stabilizing element in cast iron, which means it helps the alloy produce graphite instead of iron carbides ; at 3% silicon almost no carbon is held in chemical form as iron carbide.
Potassium graphite under argon in a Schlenk flask. A glass-coated magnetic stir bar is also present. One of the best studied graphite intercalation compounds, KC 8, is prepared by melting potassium over graphite powder. The potassium is absorbed into the graphite and the material changes color from black to bronze. [3]
A variety of colored pencils. A colored pencil (American English), coloured pencil (Commonwealth English), [1] colour pencil (Indian English), map pencil, [2] pencil crayon, or coloured/colouring lead (Canadian English, Newfoundland English) is a type of pencil constructed of a narrow, pigmented core encased in a wooden cylindrical case.
Payne's grey is a dark blue-grey colour used in painting. Originally a mixture of iron blue (Prussian blue), yellow ochre and crimson lake, [3] Payne's grey now is often a mixture of blue (ultramarine, phthalocyanine, or indigo) and black, [4] [5] or of ultramarine and burnt sienna.