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Kirigami is a variation of origami, the Japanese art of folding paper. In kirigami, the paper is cut as well as being folded, resulting in a three-dimensional design that stands away from the page. Kirigami typically does not use glue.
Wet-folding is an origami technique developed by Akira Yoshizawa that employs water to dampen the paper so that it can be manipulated more easily. This process adds an element of sculpture to origami, which is otherwise purely geometric. Wet-folding is used very often by professional folders for non-geometric origami, such as animals.
In 1883, Charles Stilwell patented a machine that made square-bottom paper bags with pleated sides, making them easier to fold and store. [3] [4] This style of bag came to be known as the S.O.S., or "Self-Opening Sack". [5] In 1912, Walter Deubener, a grocer in Saint Paul, Minnesota, used cord to reinforce paper bags and add carrying handles ...
Mailing envelopes and small packages may receive as many as 27 handlings during shipment with the maximum drop height of 1.2 metres (3.9 ft). [1] The contents of the mailing envelopes often need protection from shock and vibration damage. Cushioning or padding can be built into the mailing envelope to help protect the contents.
The resulting paper was strong, water resistant, and flexible. [3] The paper shortage "only abated in the 1870s, when rag paper was gradually replaced by paper made from wood pulp". [4] By 1873, the United States Department of Agriculture quoted Thomas H. Dunham, who described Manila paper as "nine-tenths jute" when praising jute production. [6]
Silly Putty's unusual flow characteristics are due to the ingredient polydimethylsiloxane (PDMS), a viscoelastic substance. Viscoelasticity is a type of non-Newtonian flow , characterizing a material that acts as a viscous liquid over a long time period but as an elastic solid over a short time period. [ 7 ]