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(10) Pearl (5 pt, ≈1.764 mm) and (11) Diamond (4.5 pt, 1.5875 mm). Fonts originally consisted of a set of moveable type letterpunches purchased from a type foundry. As early as 1600, the sizes of these types—their "bodies" [1] —acquired traditional names in English, French, German, and Dutch, usually from their principal early uses. [2]
However, 12 Fournier points turned out to be 11 Didot points, [11]: 142–145 giving a Fournier point of about 0.345 mm; later sources [12]: 60–61 state it as being 0.348 75 mm. To avoid confusion between the new and the old sizes, Didot also rejected the traditional names, thus parisienne became corps 5, nonpareille became corps 6, and so on.
These diamond saws and good jewelry lathes enabled the development of modern diamond cutting and diamond cuts, chief among them the round brilliant cut. In 1919, Marcel Tolkowsky analyzed this cut: his calculations took both brilliance (the amount of white light reflected) and fire into consideration, creating a delicate balance between the two ...
Each carat is further divided into 100 points. For example, a 50-point diamond is a half carat, while a diamond weighing a whole gram would tip the scales at five carats.
In Italy, Spain, and Switzerland, ring sizes are specified as the circumference minus 40 mm: for example, size 10 in this system is equivalent to ISO 8653:2016 size 50. [14] This may also be referred to as the Swiss Ring Size System.
It is also the starting point for the brunoise cut. [1] Fine julienne; measures approximately 1 ⁄ 16 by 1 ⁄ 16 by 1–2 inches (0.2 cm × 0.2 cm × 3 cm–5 cm), and is the starting point for the fine brunoise cut. [1] Chiffonade; rolling leafy greens and slicing the roll in sections from 4–10mm in width
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