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Lettering is a dying art that presents text, dimensions and notes that are hand written in a standard form. Lettering is typically all upper case without slant or formatting but the creator of a drawing will often put their own personality into the lettering. All caps on an engineering drawing is not “yelling” but is good practice and facilitates clear communication. Slanted lettering may be used for emphasis of a particular point or idea.

Letters are all block letters generally of equal width and 1/8 inch tall. The use of a mechanical guide or construction lines to control height is recommended for consistency. Unless an inked drawing is lettered using a Leroy scriber (now obsolete) lettering is done freehand. All letters are upper case only unless in a long paragraph of more than 2 sentences. Letters of a word will be close to each other without touching. Space between words is about the same as the letter H or W. Numbers are the same size as letters. Fraction numbers are slightly smaller than 1/8 inch, stacked and symmetrical to the line it is in. Multiple lines of text should leave space between each line of about half the height of a normal letter.

Special cases of lettering may be smaller or larger than the standard height. Title block lettering may be larger. Section view identifiers and cutting plane labels may also be larger.

Each letter is generally created from top to bottom and left to right. At the end of each straight leg or line of a letter, the pen or pencil is picked up and relocated for the next line. For example the letter ‘A’ consists of a stroke down and to the left, down and to the right and a final stroke left to right half way up the height connecting the two legs together. Rounded letters such as ‘O’ start at the top and go down and around to the left to the bottom, pencil up, then another stroke from the top then down and to the right closing the O at the bottom. Shortcuts are often taken making these letters with one stroke. Letters are generally sans-serif though using she serif form of ‘I’ as the word I is accepted.

Letter Gothic

is a monospaced sans-serif typeface. It was created between 1956 and 1962 by Roger Roberson for IBM in their Lexington plant. It was initially intended to be used in Selectric electric typewriters. It is readable and is recommended for technical documentation and for sheets including columnar data. Gayaneh Bagdasaryan designed aproportional font called New Letter Gothic, based on Letter Gothic, for ParaType.
Letter Gothic was included in Windows 95. It was replaced by Andalé Mono in Windows 98 and in 2001, Windows XP replaced it with Lucida Console.

Roman

In Latin-script typography, roman is one of the three main kinds of historical type, alongsideblackletter and italic. Roman type was modelled on a European scribal manuscript style of the 1400s, based on pairing Roman square capitals used in ancient Rome with Carolingian minuscules developed in the Holy Roman Empire.
During the early Renaissance, a publication would use either roman or italic type, not both. Today, roman and italic type are mixed, using roman for most of the text and italic for special purposes. Most typeface families include, at a minimum, roman, italic or oblique, and boldface character sets.
The word roman, without a capital R, customarily denotes Italian typefaces used during the Renaissance period and later upright typefaces derived from those most subsequent types based on them. With a capital R, Roman refers to letter forms dating from ancient Rome. Popular roman typefaces include Bembo, Baskerville,Caslon, Bodoni, Times New Roman and Garamond.

Old English

The old English, also known as Black letter, dates back to 1000 years ago when it was used as a script throughout Western Europe. It should be noted that old English or Black letter has nothing to do with old English language nor the old English language was written with Black letter. Various forms of black letter exist, mainly including Textualis, the most calligraphic form of the black letter; schwabacher, an old English form that was heavily used in the early German print typefaces; Fraktur, the most common German black letter typeface etc.

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