So, I have never really tried to seriously grade a comic, but with CCL I am trying to catalogue my collection as accurately as possible.
My question today is about:
SPINE ROLL:

Here is an example of what appears to me as a manufacturing/publishing error,
the staples are placed in the center but the center crease is off.

In this example the top staple is around the back while the bottom staple(not pictured) is on the front.
Again the staples are centered but the center crease is not straight of square with the book.


In these two the staples are centered along with a straight crease, but these spines, through use,
no longer lie flat and actually curve of the table like the letter ‘J’.
(hard to see in the scan but you can see the creases that run parallel with the spine).

Just for reference I put what I believe to be an excellent spine.
So my questions are:
1. What is the actual definition of “spine roll”?
2. Is spine roll a manufacturing defect or a function of well read?
3. Depending on the answer to Question #1 how do you classify the other?
4. What about when the staples are grossly off center?
5. any other spine roll or spine questions I missed?
