### Define type area for book

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What is a type area at all? We use this term to define the area of a book page which distinguishes as a filled book page from the paper itself. In other words: The type area shows the lines of a book in a full book page. (Page numbers and other dead column titles are not added to the type area.)

A beautiful type area is a pleasing relation between print space and paper space. For assessing this relation, we will always view a double page of a book – like we always see two pages of a book side by side when reading the book. Basically the type area resp. the blank paper borders should be formed in a way that the upper border is smaller than the bottom border. At the same time the inner borders of the two pages should not be wider than the relevant left or right border of a book page.

There are various methods for deducing beautiful relations of paper space and type area. Maybe you have heard about the item The Golden Section before, which is used here. A relation is perfect when the type area's relation of width and height is the same as of the paper's relation of width and height. You may e.g. define the type area in a book page using a border relation of 2:3:5:8. Using a simple DIN A5 page format and defining 16 mm for the inner border (back margin), 24 mm for the upper border (capital margin), 40 mm for the outer border and 64 mm for the bottom border (foot margin), you will get a very esthetical relation of type area and paper size very soon.

You can surely imagine that deducing the golden section for distinct page formats has been a science in gone centuries. Publishing houses tried to distance themselves from competitors, but copying these found ideal type areas over centuries has led to our still used type areas of today.

But you will now get to know a method which leads you much faster to success than any other relation formulas or miraculous value tables could ever do. You will learn how to give your books of any page format beautiful type areas. We are talking about Division By Nine and Division by Twelve – which can be learned and used very easily.

- Division by Nine and Division by Twelve