John, On that basis, with a wider margin you have another cheaper option if the reader doesn't mind, that being, to have the inner edge stapled. Maybe even 2 staples would be adequate but you will need an old time printer these days to find the find of stitcher I am referring to.
Some binders also apply a tape strip over the staples along the spine and wraparound to prevent scratches and minor cuts. You would have seen that on some older style heavier covered books already.
Only downside it is is handwork and not automated but could also be done in smaller batches to spread the costs? John
When truth is ignored, it does not change an untruth from remaining a lie.
