The bleed allowance I need for the case layout is 15 mm
why so much bleed? did your printer give you specs based on substrate and amount of pages?
Hi Grant, thanks for your reply. Does 15 mm really seem like a lot for the case layout bleed? I've just had a look at my dummy and measured the bleed (as I suppose you would call it) that wraps around the case and goes under the endpapers. It's 15 mm and that seems to make sense with the layout. The specs I got from the printer for the case layout are:
height: book size + 6 mm + 15 mm bleed
width: book size + 6 mm + 15 mm bleed.
Does that make sense?
It sounds like you new to designing for print? If so let me know what you don't understand or your conscerns...
Firstly I wont EVER (exceptions you going to finish using singer stiching, or if its a self cover) have the cover in the same document/Print ready PDF because: Size (Even if ID has the feature to do it), and Output/finishing. Different substrates sometimes need diferent output profiles.. (list can go on and on)
Secondly: lets say the text pages are 210 x 297 and you need 6mm bleed: In saddle stitching you get whats called creep and so the "extra bleed" (3mm vs 6mm) is needed when the book gets trimmed there is enough play in the bleed you with me?
Then: bleed is bleed: it gets cut away (trimmed) so if you need the cover to wrap around a board then you design it lets say 215 x 307 plus spine trim and 6 mm bleed (you should get the mesurements from the printer) to overlap the text pages by 5mm. Some printeers will give you a cover template as well.
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Does 15 mm really seem like a lot for the case layout bleed?
No, but in the end it will be easier to deal with the cover as a separate document.
If for some reason you wanted to deliver a single PDF, you could export the interior and cover then insert the cover into interior PDF from Acrobat Pro and have one PDF with crops and the different bleeds.
The bleed settings are only guides.
You can still extend the bleed by 15mm + 6mm and it will be fine.
Just export the cover as a seperate file and insert the bleed manually as 21 mm
The printers will be doing the cover separately anyway, so sending a separate file will be fine.
Yes, as mentioned above, a separate cover file would be best. But the 15mm is normal for "Perfect Case Binding", sometimes just called "Case Bind" or "Perfect Bind". These are slightly different, but the larger bleed for "Case" refers to substrate and the 'wrap-around' where the cover will glue to the inside covers, then be bound and covered by the endpapers. If you look at a hard-bound book--like a coffee table book--when you open the front cover, you'll notice that the endpapers cover up the edges of the cover which wraps around. This larger bleed makes for a nice finished look.
Hope this helps!
make sure what your printer means ie: Page size + 6mm spine bulk + 15mm bleed.
and design acordingly
I know exactly what it is. And that bears no difference. you can still extend the bleed past the bleed guidelines and when you export the PDF you can choose 21 mm bleed for the cover.
Then another eport at 6 mm (or whatever) for the rest of the document.
A seperate file would have been better - I agree. But it doesn't have to be.
InDesigns different page sizes is new, and I think there should be something there for different bleed sizes. Perhaps in Numbering and Sections to be able to specify a different bleed for different sections, perhaps.
Thank you, everyone! Your comments are much appreciated. It’s especially useful to know that dealing with the cover as a separate document is the recommended way of proceeding. This is my first printing experience, so I had assumed I should try to take advantage of the new InDesign feature that allows you to create multiple page sizes in one document, but my original question now seems rather irrelevant. I still don’t think it’s currently possible to have multiple bleed settings within one InDesign document, but that doesn’t really matter now. Thanks for your tip, rob, about delivering a single PDF, but I think I’ll opt for separate documents. Will contact the printer today to confirm everything and make sure I know exactly what I’m doing before I proceed!
Thanks again and best wishes,