PVA vs Paste on Leather Hinge Repair

This message is from a student:* I was typing out my notes and I discovered another link that doesn’t work (for me). “Optional: Page repair could be done as needed especially in the hinge area.” 3-101: Archival Page Repair for Beginners

** Secondly I wonder if this sound say ‘paste’ instead of ‘PVA’. “Color Option: This leaves a white line showing on the outer joint area. What can be done about this? Doing nothing is certainly an option. Anything applied over the leather will damage it and make it harder to restore more fully later. However, if you want to apply something, you can use very thin strip of matching color Kozo / Japanese tissue like a Moriki. It should not extend more than an eighth of an inch on either side of the break. Apply with a very dry PVA (after Klucel was applied). This will do nothing for the strength of the joint and is likely to fall off when the boards are opened but it might look better on the shelf depending on the quality of the color matching.”