What are the key considerations for hard cover book binding regarding adhesive selection, spine preparation for durability and lay-flat ability, and the type of adhesive needed for flexible page turning? Summarize the essential information from the 'Hard Cover Books' section.
Navigate directly to the 'Book Binding Adhesives' section of the website using the URL: 'https://www.pidiliteindustrialproducts.com/market/book-binding-adhesives/' Scroll down to locate and read the information under the 'Hard Cover Books' section. Identify factors influencing adhesive selection, spine preparation techniques, and adhesive properties for flexibility. Synthesize all identified information into a concise answer.
State that adhesive selection depends on paper type, cover material, and production volume, listing hot melt, cold glue, and PUR as common types. Explain that proper spine preparation ensures strong, durable binding by allowing adhesive penetration, and is critical for 'Lay-Flat Ability' in books like manuals, textbooks, and cookbooks. Identify that glues remaining flexible after drying are crucial for achieving flexibility in both soft and hard cover bindings for smooth page turning.