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6. Measure and cut boards and inlay
Overview
The width of boards used on the quarter-joint binding varies with
the thickness of the book. To ensure that the quarter-joint binding
opens properly the hinge area between the spine edge of the board and
the spine of the textblock must be at least ¼ the thickness of the
spine. Since the quarter-joint binding has no bottom square the boards
are just slightly (1/16") longer than the height of the text
block. The width of the board can be calculated using the following
equation:
board size = (length of textblock + 1/16") x (width of
textblock - ¼ spine thickness + 1/16")
Or the board width can be calculated within acceptable tolerances
according to the formula and chart below.
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board size = (length of textblock +
1/16") x
(width of textblock - width adjustment from
chart)
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Quarter-joint board width adjustments
spine thickness adjustment
up to ¾ -1/4
+3/4 to 1 ¼ -3/8
+ 1 1/4 to 1 ¾ -1/2
+1 3/4 to 2 ¼ -5/8
+
2 ¼ -3/4
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Details
- measure the length of the book and add
1/16" for board length.
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- measure thickness of the book at the spine
and note adjustment on width adjustment chart.
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- measure
width of the book and subtract the adjustment taken from the chart.
This will be the width of your board
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- Cut the
inlay from a thin (.060) binder’s board or other board stock. Cut
the inlay to the same length of the boards and to the thickness of the
spine
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