Figure 3 1- Adhesives; 2-Insert album; 3-side glue; 4- cover
The change in the volume of the adhesive after drying shrinkage results in a change in the "opening" and the angle of the contact surface between the adhered cover and the book block. See Figure 2.
5 Because the thickness and the tightness of the paper are different, the thickness of the book block after the collation will be inconsistent. In the mechanical package book, due to the fact that the rules of the cover paper transportation have been fixed, misalignment will occur due to the different thicknesses of the book blocks, making it difficult for the book spine to be biased.
(to be continued)