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How do I figure spine thickness on perfect bound books?

April 26, 2017Books bound figure Perfect spine thickness

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How do I figure spine thickness on perfect bound books?

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Divide the number of pages by two. Multiply this number by the caliper shown below for your selected paper stock. Add the cover thickness for front and back covers. Then add .005 for glue. The final number needs to be rounded down to the nearest 1/32. Use the decimal equivalent chart below. PAPER STOCK CALIPERS Husky Offset Somerset Gloss Somerset Matte 50# 0.0039 60# 0.0029 60# 0.0032 60# 0.0045 70# 0.0034 70# 0.0038 70# 0.0053 80# 0.0039 80# 0.0044 Glatfelter Natural 50# 0.005 55# 0.0055 COVER WEIGHT CALIPERS 8pt 0.008 10pt 0.010 12pt 0.012 DECIMAL EQUIVALENTS FOR EACH 1/32 1/32 .03125 11/32 .34375 21/32 .65625 31/32 .96875 2/32 .0625 12/32 .375 22/32 .6875 32/32 1 3/32 .09375 13/32 .40625 23/32 .71875 4/32 .125 14/32 .4375 24/32 .75 5/32 .15625 15/32 .46875 25/32 .78125 6/32 .1875 16/32 .5 26/32 .8125 7/32 .21875 17/32 .53125 27/32 .84375 8/32 .25 18/32 .5625 28/32 .875 9/32 .28125 19/32 .59375 29/32 .90625 10/32 .3125 20/32 .625 30/32 .