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Initially, paper was ruled by hand, sometimes using templates. [1] Scribes could rule their paper using a "hard point," a sharp implement which left embossed lines on the paper without any ink or color, [2] or could use "metal point," an implement which left colored marks on the paper, much like a graphite pencil, though various other metals were used.
Mosely has also developed mathematical techniques for designing and analyzing curved origami models such as her "Orb," [11] "Bud," [12] and "Sails." [13] Sails is a tessellation piece created from a single sheet of white watercolor paper and made up of a repeating pattern of overlapping triangles that evokes billowing sails. [14]
Hull is the author or co-author of several books on origami, including: Origametry: Mathematical Methods in Paper Folding (Cambridge University Press, 2021) [8]; Project Origami: Activities for Exploring Mathematics (AK Peters, 2006; 2nd ed., CRC Press, 2013) [9]
The Huzita–Justin axioms or Huzita–Hatori axioms are a set of rules related to the mathematical principles of origami, describing the operations that can be made when folding a piece of paper. The axioms assume that the operations are completed on a plane (i.e. a perfect piece of paper), and that all folds are linear. These are not a ...
It appears again, with the salt cellar name, in several other publications in the 1880s and 1890s in New York and Europe. Mitchell also cites a 1907 Spanish publication describing a guessing game similar to the use of paper fortune tellers. [20] The use of this shape as a paper fortune-teller in England has been recorded since the 1950s. [21]
Origami paper, often referred to as "kami" (Japanese for paper), is sold in prepackaged squares of various sizes ranging from 2.5 cm (1 in) to 25 cm (10 in) or more. It is commonly colored on one side and white on the other; however, dual coloured and patterned versions exist and can be used effectively for color-changed models.