When the process of porting existing typesetting technology to computers began in earnest in the 60’s & 70’s, the terminology and nomenclature of the old linotype technology was retained. This has created great confusion and misunderstanding among computer users whose backgrounds are not in the graphic arts. Here are a few frequently asked questions about what the terminology means.
Why is Type Measured in “Points” Instead of Inches?
In essence, because it’s easier. By defining an inch as equivalent to 72 points, smaller type sizes could be defined easily without resorting to cumbersome fractions.
What is “Leading”?
Prior to the age of modern computer technology, type was set using a machine (invented by Ottmar Mergenthaler in 1884) that used hot lead to set one line of type at a time. When greater spacing was desired between lines of type, a lead ingot was added to each line of type. Hence, “leading” refers to the space between lines of text.
Why Does 10pt Utopia Look Bigger Than 10pt Caslon?
The designation “10pts” refers to a measurement within which a character set must fit. Typefaces vary in how much space is built-in above and below the characters as well as in their width, x-height and stroke weight. A further complication is the use of different systems of measurement (both historically and geographically) which contributes to the lack of consistency in type sizes we see today.
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Used with permission from A Basic Font Primer by TH Design, Inc.
