Paper Documents, Envelopes, and Drawing Pens
Standard metric paper sizes use the square root of two and related numbers (√√√2, √√2, √2, 2, or 2√2) as factors between neighbour dimensions (Lichtenberg series, ISO 216). The √2 factor also appears between the standard pen thicknesses for technical drawings (0.13, 0.18, 0.25, 0.35, 0.50, 0.70, 1.00, 1.40, and 2.00 mm). This way, the right pen size is available to continue a drawing that has been magnified to a different standard paper size.
Read more about this topic: Preferred Number
Famous quotes containing the words paper, drawing and/or pens:
“What presence must not know,
From where you do remain let paper show.”
—William Shakespeare (1564–1616)
“In the drawing room [of the Queen’s palace] hung a Venus and Cupid by Michaelangelo, in which, instead of a bit of drapery, the painter has placed Cupid’s foot between Venus’s thighs. Queen Caroline asked General Guise, an old connoisseur, if it was not a very fine piece? He replied “Madam, the painter was a fool, for he has placed the foot where the hand should be.””
—Horace Walpole (1717–1797)
“Let other pens dwell on guilt and misery. I quit such odious subjects as soon as I can, impatient to restore every body, not greatly in fault themselves, to tolerable comfort, and to have done with all the rest.”
—Jane Austen (1775–1817)