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Spine Calculator Borked?
Greetings. I'm a new publisher to Lulu but have plenty of experience in layout and publishing in general. My workflow consists of purely working in InDesign and Photoshop. My cover is an all-in-one, made to Lulu's speicifications.
My proof copy is a 6x9 perfect bound trade paperback printed in full color, full bleed, printed on 80# gloss paper with 250 pages. It is a very complex projct. I'm pleased to say that the interior print came out exactly like it should; I was greatly impressed. The cover looks great too, execpt that the size and spine measurements are off consideratbly.
Lulu's "spine calculator" and Advanced Cover tool both told me to use a cover size of 12.88 in by 9.25 in. My spine starts 6.125 in from the left and is 0.625 in wide. Those are the setting I used. However, in the final product my spine starts correctly but is far too large; the back cover "rolls over" onto the spine.
My printed produt's spine (again, on Lulu's full color 80# paper) is actually ~.75 in wide, or ~19 mm thick. A signifigant gap.
Going to a third-party site (http://www.lugaru.com/bookweight.html) I entered similiar settings tells me that my spine thickness should be 0.684 in which is a little closer to my actual output. Putting in 100# interior paper thickness gives me a spine thickness of 0.854 in, which is very close to what I actually have in front of me.
So, the question: does Lulu's spine calculator work for "Standard, Perfect Boudn Paperback," Full Color on 80# paper correctly? I printed out using their speificiations and my spine is NOT .0625 thick. My physical copy has a spine that is ~0.75 in thick or ~19 mm.