In magazines there's a thing called full bleed, where the image goes to the edge of the paper, and the gutter between pages is glued together so cutting, shavin

In magazines there's a thing called full bleed, where the image goes to the edge of the paper, and the gutter between pages is glued together so cutting, shaving or flattening will still lose some image as the binding process isn't consistent, so to save as much image as possible, they're going to the trouble to be the archival standard, after all, he decided the deglue is best. Great article.