Description
Archival Bookbinding Glues
Bookbinding adhesives must remain permanently flexible to withstand the mechanical stress of a book spine constantly opening and closing. They are chemically neutral to prevent the degradation of organic paper, cloth, and leather fibers.
The industry relies on three main types of bookbinding adhesives:
1. Polyvinyl Acetate (PVA)
- What it is: A water-based, liquid co-polymer emulsion. Famous brands like Lineco Books by Hand or Jade 403 define the professional standard.
- Role: The foundational glue for modern hand-binding. It is acid-free and pH-neutral, drying completely clear and remaining highly flexible over decades. It is used for gluing down spines, endpapers, and casing-in.
2. Starch Pastes (Wheat & Rice Starch)
- What it is: Pure, natural plant starches cooked with water into a smooth paste.
- Role: The gold standard for high-end conservation and book restoration. Unlike PVA, starch paste is 100% reversible with water, allowing a future conservator to undo the bind easily without pulling paper fibers away. It is often mixed with PVA (known as “The Mix”) to extend working time.
3. Polyurethane Reactive (PUR) Hot Melt
- What it is: A high-performance, industrial-grade thermosetting adhesive that triggers a chemical reaction with moisture in the paper fibers.
- Role: Used strictly in industrial, high-volume archival publishing and heavy-use reference library bindings. PUR provides the strongest pull-strength available, making it immune to solvent attacks, extreme temperature swings, and page-pull failures.
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