●
Corresponding to the Inner amount rules, the Outer amount
is applied to the outermost pages.
The shingling amounts are distributed evenly to the remaining
pages (based on the total number of pages and the template
binding style).
Background: Page creep occurs when a signature is folded and
the image area of the inside pages of a signature extend slightly
beyond the image area of the outside pages. The amount of
creep is affected by the number of folds and by paper thickness.
In perfect-bound jobs, creep is limited to the pages in each
individual signature. In saddle-stitched jobs, each folded
signature is placed inside another folded signature, causing the
inside signature to extend a bit farther than the signature inside
which it is placed.
Calculating Shingling Amounts
Calculate the amount of shingling to compensate for creep in a
job. There are two methods of calculating shingling amounts:
using an approximate formula, and using the exact method.
Approximate formula
: (number of sheets / 4 ) x stock
thickness
Notes: The value you use for the number of sheets depends on the
binding type:
●
If perfect bound, this refers to pages per signature
●
If saddle-stitched, this is pages per entire book
The value of stock thickness is measured in microns. You can
use a micrometer to determine this or use the measurement
value provided by the paper supplier.
Exact method
:
1. Make a folding dummy using the same kind of paper and the
same folding equipment you plan to use for the job.
2. Measure the amount of creep with a precise instrument.
3. Measure the difference between the outer edge (face) of the
outermost page and the outer edge of the innermost page.
Next, apply the shingling amounts
1. In the
New Imposition
dialog box, select
Prinergy Signature
Selection
and select
OK
.
2. In the
New Imposition Details
dialog box, type the inner
and/or outer shingling amounts.
1078
Chapter 21—Integrated products
