A Perfect Bound Cover requires special attention to the following areas:
- The spine bulking value needs to be calculated based on the total number of text pages and the type of stock being used.
- A Hinge Score, both front and back at a distance of 0.1875” from the spine edge needs to be compensated for in the design.
- Crossover designs, between inside covers and first or last text pages should be overall 0.375″ narrower than other spreads.
Use our Spine Calculator here and enter the total number of text pages in your project. This value will be used when creating the spine as the left bleed margin of cover 1 following the guidelines here.
A hinge score of 0.1875″ (3/16″) on the front and back cover can create a small impression on the surface of the outside covers depending on the stock being used. It is a good idea to keep type and other live matter away from the spine edge by this amount. For inside covers, this same margin applies and results in a page that is 0.1875″ smaller than the other pages. Keep this in mind during the design phase to ensure live matter does not fall within this area.
INSIDE COVER CROSSOVER (Double Page Ad)
For double page ads that span inside front cover to first text page, or last text page to inside back cover, the spread width is actually 0.375″ less. To accomplish this, proper Ad Specifications should be provided to advertisers when designing for inside covers. If no compensation has been made at the advertiser level for the narrower ad, the oversized spread can be manipulated when placing it into your single facing pages layout using one of the following methods:
Method 1- Scaling: Place the ad on the left facing page and scale the width only to reduce the overall ad width by 0.375″… next, duplicate the ad and shift to the right 0.375″, crop both left and right components to the center of the spread.
Method 2- Shifting: Place the ad on the left facing page and shift the ad to the left… next, duplicate the ad and shift to the right 0.375″, crop both left and right components to the center of the spread. (see movie below)