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Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
Don Quixote and his sidekick Sancho Panza, as illustrated by Gustave Doré: the characters' contrasting qualities [1] are reflected here even in their physical appearances. In any narrative, a foil is a character who contrasts with another character, typically, a character who contrasts with the protagonist, in order to better highlight or differentiate certain qualities of the protagonist.
The FOIL method is a special case of a more general method for multiplying algebraic expressions using the distributive law. The word FOIL was originally intended solely as a mnemonic for high-school students learning algebra. The term appears in William Betz's 1929 text Algebra for Today, where he states: [2]
The hot foil trick is a magic trick in which the magician places a small piece of tin or aluminium foil in a volunteer's hand, and the foil begins to rapidly increase in temperature until the volunteer has to drop it to avoid scalding their hand, and the foil is reduced to ashes on the ground.
Fröbel's Gift 4, on a special gridded tabletop he also specified. The Sunday Papers (Sonntagsblatt) published by Fröbel between 1838 and 1840 explained the meaning and described the use of each of his six initial "play gifts" (Spielgabe): "The active and creative, living and life producing being of each person, reveals itself in the creative instinct of the child.
A foil is an architectural device based on a symmetrical rendering of leaf shapes, defined by overlapping circles of the same diameter that produce a series of cusps to make a lobe. Typically, the number of cusps can be three ( trefoil ), four ( quatrefoil ), five (cinquefoil [ 1 ] ), or a larger number (multifoil). [ 2 ]
Cold foil printing, also known as cold foil stamping, is a modern method of printing metallic foil on a substrate in order to enhance the aesthetic of the final product. . Cold foil printing can be done two ways: the older dry lamination process common in the offset printing industry, or the newer, more versatile wet lamination process, which is dominant in the flexo label indus
Foil stamping, a printmaking technique; Foil (fencing), one of the three weapons used in modern fencing; Foil (fiction), a subsidiary character who emphasizes the traits of a main character Comedic or comic foil, the straight man in a comedy double act "Foil" (song), "Weird Al" Yankovic's parody of Lorde's song "Royals"