A 7x10 inch perfect bound book of greater than 400 pages in length is being assembled on a Horizon BQ-270V Perfect Binder.
I am looking for guidance for calculating the size of the gutters adjacent the spine (i.e., the opposing inside margins closest to the spine).
It is my understanding that the size of the gutter is dependent in part on the weight of the paper, the total number of pages, and the acceptable level of stress applied to the spine when opening the book. While I have methods for calculating the size of the gutter, I am seeking a formula specific to the BQ-270V or Horizon binders in general.
Thank you.