This old comic book was worn and fragile along the page edges and falling apart at the spine; a condition mainly due to the acidity of the paper. The book, however, did not warrant extensive treatment and the customer wished to keep the cost of repair to a minimum. I was able to de-acidify the book enough to work on and give it a few more years of use, with a partial spray of magnesium oxide. All the repairs were made with heat-set tissue. The book was then re-sewn and re-cased.