Introduction
Although hardcover books are more durable than paperback, they are prone to damage over time due to many factors, such as bookshelf organization and book handling. Bumped corners are a common type of damage for hardcover books. Luckily, following this guide will strengthen the overall condition of your book with a few safe and simple steps!
Disclaimer: The time estimate is for one hardcover corner, as it takes 5-10 minutes to complete steps 1-5 with a 30-minute wait time from step 5. It will take a little longer than 35-45 minutes to do more than one corner.
Tools
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            Open the book to one cover corner. 
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            Apply the PVA glue on a bumped corner using the glue tip or a small paintbrush. 
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            Coat the worn layers with the same paintbrush. 
 
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            Pinch the corner layers together with a piece of cloth. 
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            Remove excess glue with paper towels or a cloth rag. 
 
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And that's bookbinding! Enjoy your book in new condition.