Glue Set

What it does

• Glue width is a function of spine bulk, not of the cover design.
• Too little adhesive leaves a hollow spine; too much bleeds into the hinge.
• The set point is a measured band on the spine.

How to use it

1. Measure the spine after the text block is trimmed, not from the flat size.
2. A wider glue band does not fix a spine that is already too narrow.
3. Set time depends on the adhesive and the shop temperature.
4. Keep a sample of the glue batch with the job ticket.

Safety notes

• Do not judge glue set from the outside of the cover; open the book and look at the hinge.
• If glue reaches the cover fold, reduce the band before the next batch.